Only Questions

Core Java FAQs1. What is the difference between an Abstract class and Interface? 2. What are checked and unchecked exceptions? 3. What is a user defined exception? 4. What is the difference between C++ & Java? 5. What are statements in JAVA ? 6. What is JAR file? 7. What is JNI? 8. What is serialization? 9. Why there are some null interface in java ? What does it mean ? Give me some null interfaces in JAVA? 10. Is synchronised a modifier? identifier? what is it?? 11. What is singleton class? where is it used? 12. What is a compilation unit? 13. Is string a wrapper class? 14. Why java does not have multiple inheritance? 15. Why java is not a 100% oops? 16. What is a resource bundle? 17. What is transient variable? 18. What is Collection API? 19. Is Iterator a Class or Interface? What is its use? 20. What is similarities/difference between an Abstract class and Interface? 21. What is a transient variable? 22. Which containers use a border Layout as their default layout? 23. Why do threads block on I/O? 24. How are Observer and Observable used? 25. What is synchronization and why is it important? 26. Can a lock be acquired on a class? 27. What's new with the stop(), suspend() and resume() methods in JDK 1.2? 28. Is null a keyword? 29. What is the preferred size of a component? 30. What method is used to specify a container's layout? 31. Which containers use a FlowLayout as their default layout? 32. What state does a thread enter when it terminates its processing? 33. What is the Collections API? 34. Which characters may be used as the second character of an identifier, but not as the first character of an identifier?. 35. What is the List interface? 36. How does Java handle integer overflows and underflows? 37. What is the Vector class? 38. What modifiers may be used with an inner class that is a member of an outer class? 39. What is an Iterator interface? 40. What is the difference between the >> and >>> operators? 41. Which method of the Component class is used to set the position and size of a component? 42. How many bits are used to represent Unicode, ASCII, UTF-16, and UTF-8 characters? 43. What is the difference between yielding and sleeping? 44. Which java.util classes and interfaces support event handling? 45. Is sizeof a keyword? 46. What are wrapped classes? 47. Does garbage collection guarantee that a program will not run out of memory? 48. What restrictions are placed on the location of a package statement within a source code file? 49. Can an object's finalize() method be invoked while it is reachable? 50. What is the immediate superclass of the Applet class? 51. What is the difference between preemptive scheduling and time slicing? 52. Name three Component subclasses that support painting. 53. What value does readLine() return when it has reached the end of a file? 54. What is the immediate superclass of the Dialog class? 55. What is clipping? 56. What is a native method? 57. Can a for statement loop indefinitely? 58. What are order of precedence and associativity, and how are they used? 59. When a thread blocks on I/O, what state does it enter? 60. To what value is a variable of the String type automatically initialized? 61. What is the catch or declare rule for method declarations? 62. What is the difference between a MenuItem and a CheckboxMenuItem? 63. What is a task's priority and how is it used in scheduling? 64. What class is the top of the AWT event hierarchy? 65. When a thread is created and started, what is its initialstate? 66. Can an anonymous class be declared as implementingan interface and extending a class? 67. What is the range of the short type? 68. What is the range of the char type? 69. In which package are most of the AWT events thatsupport the event-delegation model defined? 70. What is the immediate superclass of Menu? 71. What is the purpose of finalization? 72. Which class is the immediate superclass of theMenuComponent class. 73. What invokes a thread's run() method? 74. What is the difference between the Boolean & operatorand the && operator? 75. Name three subclasses of the Component class. 76. What is the GregorianCalendar class? 77. Which Container method is used to cause a containerto be laid out and redisplayed? 78. What is the purpose of the Runtime class? 79. How many times may an object's finalize() method beinvoked by the garbage collector? 80. What is the purpose of the finally clause of a try-catchfinally statement? 81. What is the argument type of a program's main()method? 82. Which Java operator is right associative? 83. What is the Locale class? 84. Can a double value be cast to a byte? 85. What is the difference between a break statement anda continue statement? 86. What must a class do to implement an interface? 87. What method is invoked to cause an object to beginexecuting as a separate thread? 88. Name two subclasses of the TextComponent class. 89. What is the advantage of the event-delegation modelover the earlier eventinheritance model? 90. Which containers may have a MenuBar? 91. How are commas used in the intialization and iterationparts of a for statement? 92. What is the purpose of the wait(), notify(), andnotifyAll() methods? 93. What is an abstract method? 94. How are Java source code files named? 95. What is the relationship between the Canvas class and the Graphics class? 96. What are the high-level thread states? 97. What value does read() return when it has reached the end of a file? 98. Can a Byte object be cast to a double value? 99. What is the difference between a static and a nonstaticinner class? 100.What is the difference between the String and StringBuffer classes? 101.If a variable is declared as private, where may the variable be accessed? 102.What is an object's lock and which object's have locks? 103.What is the Dictionary class? 104.How are the elements of a BorderLayout organized? 105.How are the elements of a BorderLayout organized? 106.When can an object reference be cast to an interfacereference? 107.What is the difference between a Window and aFrame? 108.Which class is extended by all other classes? 109.Can an object be garbage collected while it is stillreachable? 110.Is the ternary operator written x : y ? z or x ? y : z ? 111. What is the difference between the Font andFontMetrics classes? 112.How is rounding performed under integer division? 113.What happens when a thread cannot acquire a lockon an object? 114.What is the difference between the Reader/Writer class hierarchy and the InputStream/OutputStream classhierarchy? 115.What classes of exceptions may be caught by a catchclause? 116.If a class is declared without any access modifiers,where may the class be accessed? 117.What is the SimpleTimeZone class? 118.What is the Map interface? 119.Does a class inherit the constructors of itssuperclass? 120.For which statements does it make sense to use alabel? 121.What is the purpose of the System class? 122.Which TextComponent method is used to set aTextComponent to the read-only state? 123. How are the elements of a CardLayout organized? 124.Is &&= a valid Java operator? 125.Name the eight primitive Java types? 126.Which class should you use to obtain designinformation about an object? 127.What is the relationship between clipping andrepainting? 128.Is "abc" a primitive value? 129.What is the relationship between an event-listenerinterface and an event-adapter class? 130.What restrictions are placed on the values of eachcase of a switch statement? 131.What modifiers may be used with an interfacedeclaration? 132.Is a class a subclass of itself? 133.What is the highest-level event class of the eventdelegationmodel? 134.What event results from the clicking of a button? 135.How can a GUI component handle its own events? 136.What is the difference between a while statementand a do statement? 137.How are the elements of a GridBagLayout organized? 138.What advantage do Java's layout managers provideover traditional windowing systems? 139.What is the Collection interface? 140.What modifiers can be used with a local inner class? 141.What is the difference between static and non-staticvariables? 142.What is the difference between the paint() andrepaint() methods? 143.What is the purpose of the File class? 144.Can an exception be rethrown? 145.Which Math method is used to calculate the absolutevalue of a number? 146.How does multithreading take place on a computerwith a single CPU? 147.When does the compiler supply a default constructorfor a class? 148.When is the finally clause of a try-catch-finallystatement executed? 149.Which class is the immediate superclass of theContainer class? 150.If a method is declared as protected, where may themethod be accessed? 151.How can the Checkbox class be used to create a radiobutton? 152.Which non-Unicode letter characters may be used asthe first character of an identifier? 153.What restrictions are placed on method overloading? 154.What happens when you invoke a thread's interruptmethod while it is sleeping or waiting? 155.What is casting? 156.What is the return type of a program's main()method? 157.Name four Container classes. 158.What is the difference between a Choice and a List? 159.What class of exceptions are generated by the Javarun-time system? 160.What class allows you to read objects directly from astream? 161.What is the difference between a field variable and alocal variable? 162.Under what conditions is an object's finalize()method invoked by the garbage collector? 163.How are this() and super() used with constructors? 164.What is the relationship between a method's throws clause and the exceptions that can be thrown during the method's execution?? 165.What is the difference between the JDK 1.02 event model and the event-delegation model introduced withJDK 1.1? 166.How is it possible for two String objects withidentical values not to be equal under the == operator? 167.Why are the methods of the Math class static? 168.What Checkbox method allows you to tell if aCheckbox is checked? 169.What state is a thread in when it is executing? 170.What are the legal operands of the instanceofoperator? 171. How are the elements of a GridLayout organized? 172.What an I/O filter? 173.If an object is garbage collected, can it becomereachable again? 174.What is the Set interface? 175.What classes of exceptions may be thrown by a throwstatement? 176.What are E and PI? 177.Are true and false keywords? 178.What is a void return type? 179.What is the purpose of the enableEvents() method? 180.What is the difference between the File andRandomAccessFile classes? 181.What happens when you add a double value to aString? 182.What is your platform's default character encoding? 183.Which package is always imported by default? 184.What interface must an object implement before itcan be written to a stream as an object? 185.How are this and super used? 186.What is the purpose of garbage collection? 187.What is a compilation unit? 188. What interface is extended by AWT event listeners? 189.What restrictions are placed on method overriding? 190.How can a dead thread be restarted? 191.What happens if an exception is not caught? 192.What is a layout manager? 193.Which arithmetic operations can result in thethrowing of an ArithmeticException? 194.What are three ways in which a thread can enter thewaiting state? 195.Can an abstract class be final? 196.What is the ResourceBundle class? 197.What happens if a try-catch-finally statement does not have a catch clause to handle an exception that is thrown within the body of the try statement? 198.What is numeric promotion? 199.What is the difference between a Scrollbar and aScrollPane? 200.What is the difference between a public and a nonpublicclass? 201.To what value is a variable of the boolean typeautomatically initialized? 202.Can try statements be nested? 203.What is the difference between the prefix and postfixforms of the ++ operator? 204.What is the purpose of a statement block? 205.What is a Java package and how is it used? 206.What modifiers may be used with a top-level class? 207.What are the Object and Class classes used for? 208.How does a try statement determine which catchclause should be used to handle an exception? 209.Can an unreachable object become reachable again? 210. When is an object subject to garbage collection? 211.What method must be implemented by all threads? 212.What methods are used to get and set the text labeldisplayed by a Button object? 213.Which Component subclass is used for drawing andpainting? 214.What are synchronized methods and synchronizedstatements? 215.What are the two basic ways in which classes thatcan be run as threads may be defined? 216.What are the problems faced by Java programmerswho don't use layout managers? 217.What is the difference between an if statement and aswitch statement? 218.What happens when you add a double value to aString? 219.What is the List interface? Collections 1. What are limitations of object Arrays? 2. What are differences between arrays and collections? 3. what are differences between arrays and ArrayList? 4. What are differences between arrays and Vector? 5. What is Collection API ? 6. What is Collection framework? 7. What is difference between Collections and Collection? 8. Explain about Collection interface? 9. Explain about List interface? 10. Explain about Set interface? 11. Explain about SortedSet interface? 12. Explain about NavigableSet ? 13. Explain about Queue interface? 14. Explain about Map interface? 15. Explain about SortedMap ? 16. Explain about NavigableMap? 17. Explain about ArrayList class? 18. What is RandomAccess Interface? 19. Explain about LinkedList class? 20. Explain about Vector class? 21. What is difference between ArrayList and Vector? 22. How we can get synchronized version of ArrayList? 23. What is difference between size and capacity of a Collection Object? 24. What is difference between ArrayList and Linked List? 25. What are legacy classes and interfaces present in Collections framework ? 26. what is difference Enumeration and Iterator? 27. What are limitations of Enumeration? 28. What is difference between enum and Enumeration? 29. What is difference between Iterator and ListIterator? 30. What is relation between ListIterator and Iterator? 31. Explain about HashSet class? 32. If we are trying to insert duplicate values in Set what will happen? 33. What is LinkedHashSet? 34. Differences between HashSet and LinkedHashSet? 35. What are major enhancements in 1.4 version of collection frame work? 36. Explain about TreeSet? 37. What are differences between List and Set interfaces? 38. What is Comparable interface? 39. What is Comparator interface? 40. What are differences between Comparable and Comparator? 41. What is difference between HashSet and TreeSet? 42. What is Entry interface? 43. Explain about HashMap? 44. Explain about LinkedHashMap? 45. Differences between HashMap and LinkedHashMap ? 46. Differences between HashMap and Hashtable? 47. What is IdentityHashMap? 48. What is difference between HashMap and IdentityHashMap? 49. What is WeakHashMap? 50. What is difference between HashMap and WeakHashMap? 51. What is TreeMap? 52. What is Hashtable 53. What is PriorityQueue? 54. What is Arrays class? Is it possible to throw an Error? 24. When compared with C++ what is the advantage in java with respect to Multithreading? 6. We are planning to do an indexed search in a list of objects. Is it possible to take two finally blocks for the same try? 21. What is a customized Exception? 37. If we are not overriding run() method what will happened? . What is the purpose of Exception Handling? 3. What is difference between partially checked and fully checked Exception? 36. What is the difference between process-based and Thread-based Multitasking? 3. Which class act as root for entire java Exception hierarchy? 33.start() and t. Explain Default Exception Handling Mechanism in java? 5. What is Multitasking? 2. Explain the cases where you used Exception Handling in your previous project? Multi Threading FAQs 1. finally and finalize()? 19. What is an Exception? 2. What is the difference between final. What is the purpose of throws? 27. What is the difference between throw and thrown? 29. catch inside catch block? 13. 40. Is it possible to use throws keyword for any java class? 30. Explain about Thread Scheduler? 9. catch inside try block? 12. catch.run() method? 8. If we are taking catch block for an exception but there is no chance of rising that exception in try then what will happen? 31. In which situation finally block will not executed? 17. What is the difference between t. 38. 10. What is advantage of Multithreading? 5. Is try with multiple catch block is possible? 8. What is the difference between throw and throws? 28. Is it possible to take try without catch? 14. Can you give the most common occurred exception in your previous project. Is it possible to throw any java object? 25. Is it possible to write any statement between try-catch and finally? 20. Explain the process of creating the customized Exception. Explain Exception Handling keyword? 32. If an exception rised inside catch block then what will happen? 11. Explain control flow in try. If try with multiple catch block present is order of catch blocks important in which order we have to take? 9.55. What is difference between checked exception and unchecked exception? 35. finally. What is the purpose of finally block? 15. 39. Which of the two Java collections should you use: ArrayList or LinkedList? 56. Is it possible to take try. What is the meaning of Exception Handling? 4. What is the purpose of catch block? 7. Is syntax try-finally-catch is valid ? 22. What are various methods to print Exception information? and differentiate them. Why ArrayList is faster than Vector? Exception Handling FAQs 1. What is the purpose of try? 6. What is Multithreading and explain its application areas? 4. If return statement present inside try is finally block will be executed? 18. Is finally block will be execute always? 16. What is the purpose of throw? 23. Is it possible to take try. What is the difference between Error and Exception? 34. After throw is it allow to take any statement directly? 26. In how many ways we can define a Thread? Among extending Thread and implementing Runnable which is recommended? 7. 11. 16. 17. 49. 23. 30. 60. 51. notify(). 15. 13. 57. 50. 54. 35. 37. 47. 45. 22. notifyAll() method can available in which class? Why wait(). notify(). 34. 41. 32. 64. 18. Where we can use synchronized keyword? What is object lock? Explain when it is required? What is the class level lock? Explain its purpose. 52.10. 56. 25. 53. 44. 61. 28. notifyAll() method defines in object class instead of Thread class? If a waiting thread got notification then it will entered into which state? In which method threads can release the lock? Explain wait(). 14. 55. 42. 36. After starting a thread is it possible to change Daemon nature? When the Daemon thread will be terminated? What is green Thread? Explain about Thread group? What is the Thread Local? . 31. 33. 19. 62. 63. 38. 24. 48. Is overloading of run() method is possible? Is it possible to override start() method? we are overriding start() method then what will happen? Explain life cycle of a Thread? What is the importance of Thread class start() method? After starting a Thread if we trying to restart the same thread once again what will happen? Explain Thread class constructors? How to get and set name of a Thread? What is the range of Thread priority in java? Who uses Thread priority? Once we created a new Thread what about its priority? How to get and set priority of a Thread? If we are trying to set priority of a Thread as 100 what will happen? If two threads having same priority then which thread will get chance first for execution? If two threads having different priority then which thread will get chance first for execution? How we can prevent a thread from execution? What is yield() method? Explain its purpose? What is purpose of join() method? Is join() method is overloaded? What is the purpose of sleep() method? What is synchronized keyword? Explain its advantages and disadvantages. 43. notify(). 59. 40. 29. 39. 46. 26. 21. 27. 20. While a thread executing any synchronized method on the given object is it possible to execute remaining synchronized method of the same object simultaneously by any other thread? What is the difference between synchronized method and static synchronized method? What is the advantage of synchronized block over synchronized method? What is synchronized statement? How we can declare synchronized block to get class level lock? How two thread will communicate with each other? wait(). 12. 58. notifyAll() method uses. What is the difference between notify() and notifyAll()? Once a Thread got the notification then which waiting thread will get chance? How a thread can interrupt another thread? What is DeadLock? Is it possible to resolve DeadLock situation? Which keyword causes DeadLock situation? How we can stop a thread explacitly? Explain about suspend() and resume() method? What is Starvation()? And Explain the difference between Deadlock and Starvation? What is race condition? What is Daemon Thread? And give an example? What is the purpose of a Daemon Thread? How we can check Daemon nature of a Thread? Is it possible to change a Daemon nature of a Thread? Is main thread is Daemon or non-daemon? Once we created a new thread is it daemon or non-daemon. Ingeneral execute() method can be used to execute updatation group SQl queries for updating the data on Database . If we use selection group SQL query to executeUpdate() . Explain about SingleThreadModeal? . How to insert records into a table from a JDBC application? 13. What is meant by Transaction? How it is possible to maintain Transactions in JDBC applications? 34. What is Driver? How many Drivers are available in JDBC? What are the types? 4. What is the default ResultSet type in JDBC application and How it is possible to create a specific type of ResultSet object? 23. What is ment by ResultSet object and How to Fetch the Data from Database?. 30. how getConnection() will create an object for Connection interface? 8. What methods we can call on RequesrDispatcher Object? 13. How to insert records into Database throws Updatable ResultSet? 26. By using which 2 Packages we can implement Servlet? 11.what happened? 20. What is the purpose of RequestDispatcher? 12. How to execute SQL Queries from a java application? 10. In your previous project where you used multithreading concept? JDBC FAQs 1. Specify parallel technologies to the servlet? 7. In How many ways we can develop a servlet? 2. What is the difference between traditional & Fast CGI? 4. How to update a table from a jdbc application?. but execute() return a boolean value true so here how it possible to fetch the data from database? 17. How to perform updations on Database throws Updatable ResultSet? 27. 32. What is ment by ResultSet and What are the types of ResultSets are available in JDBC application? 21. What is the difference between Database and Database management system? 2. What is JDBC and What are the steps to write a JDBC application? 5. What is meant by ResultSetMetaData ?How to get The ResultSet metadata of a ResultSet object? 28. What is the requirement to use Statement object? 9. Hhow to insert number of records into a table through Prepared Statement object. 15. 31. If we use updatation group SQL query to executeQuery() . How to generate ScrollSensitive Result Set and how to reflect the later updations from database automatically to the ResultSet object? 25. How to update the database through PreparedStatement object. How to fetch the data from database through PreparedStatement object. Ingeneral execute() method can be used to execute selection group SQl queries for getting the data from Database . 14. What are the differences between Statement and PreparedStatement? (or) Tell me the situations where we should go for PreparedStatement over Statement object. How to create a table dynamically from a jdbc application?. What is the difference between ServletConfig & ServletContext? 5. but execute() return a boolean value false so here how it possible to get the records updated count value(int value)? 18. What is the difference between web server & web container? 8. What are the various types of web containers? 10.what happened? 19. What is the difference between web server & application server? 9. How to define a Servlet? 6. 16. Basically Connection is an interface. How a query could be executed when we send a query to Database? 3. How to display the data with the respective field names 29. What are the differences between executeQuery(…). How to delete records from a table from jdbc application?. What is the difference between ScrollSensitive ResultSet and ScrollInsensitive ResultSets? 22. executeUpdate(…) and execute(…) methods? 11. How to load a JDBC driver? 6. 33. What is the difference between CGI & Servlet? 3. What is meant by SavePoint?How to use Savepoints in JDBC applications? Servlets FAQs 1.65. 12. How to iterate the data from Scrollable ResultSet objuect in both forward and backword direction? 24. How to establish a Database connection between java application and Database? 7. Which Http methods are idempotent? 48.What is the purpose of <load-on-startup>? 35. What are the various Event classes present in Servlet Specification? 20. By using which interfaces we can implements Filter concept? 18.e.Explain the difference between GET&POST? 43.Why init() is required to perform initialization activities instead of constructor? 28.What is the difference between PUT&GPOST? 46.What are the (various ) lifecycle methods of the Servlet? 24.What are various HttpRequest methods? 44.Even though HttpServlet doesn't contain any abstract method why it is declared as abstract class? 57.What is the significance of the number for <load-on-startup>? 36. What are the various methods present in SingleThreadModeal? 16.By using which object we can send text data as response from the Servlet? 21.If you are sending Get request but our Servlet contains doGet() & service() Methods then which method will be executed? 55.What are various possible status code of response? 42.Explain life cycle of getRequest? 53.Is it possible to send multiple content type as response from the same servlet? 66.Explain about GenericServlet? 38.If two servlets having same <load-on-startup>value then which wii be loaded first? 37. With in the <servlet-mapping> how many url pattrerns taken at a time? 33.By using which object we can read binary data send by the client? 22.Which interfaces are implemented by GenericServlet? 39.What are the various methods to retrieve from parameters? 58.Is it possible to perform Initialization activities with in the constructor? 29.Explain LifeCycle of the Servlet? 34.What is the MIME type? 65. By using which object we can send binary data send as response from the Servlet? 23. What is the marker interface? Example? 17.Write Servlet code to send movie file as response? 67.If init() method throws any Exception i. To what value is a variable of the String type automatically initialized?How we can retrieve cookies from the request? 61. if init() method fails to execute then what will be happen? 26. Explain about SingleThreadModeal? 15.Is it possible to write constructor with in the Servlet? 27.Explain best way of overriding init()? 41.14.What is the default method for the form? 50.What are different ways to trigger POST request? 51.Explain about destroy? 31.How we can set ContentType to the response? 64.What is the difference between HEAD&GET? 45.How many service() methods available in HttpServlet? 52.How we can retrieve headers associated with the ServletRequest? 60.What is the purpose of request Headers? 59.What is the purpose of service() & How Many times it will be Executed? 30.What is the necessity of having 2 init() methods with in the Servlet? 40.How we can add response headers to the ServletResponse? 63.Which Http methods are non-idempotent? 47. What are the various listeners are available in Servlet specification? 19.Is it recommended to override service() in Http based Servlet? 54.By using which method we can get client &server information from the request? 62.In how many ways we can trigger a GET request? 49.If you are sending Get request but our Servlet doesn't contain doGet() what happen? 56.Explain the purpose of the init() method & How many times it will be excuted? When it will be executed? Q25.Is it possible to get PrintWriter & ServletOutputStream objects simultaneously? .Is it Possible to call destroy() method explicitly from service? 32. xml? 84.xml and when it will get chance for execution? 98. e) To display all attribute names present in a specified scope? .What is the necessity of error page and explain the process of Configuration in web.With in the <servlet-mapping>how many url pattrern tags we can take? 97.With in the <web-app> which tags are mandatory? 85.Is there any alternate location to place servlet . Is it possible to configure welcome file in folder wise? 103.Is it possible to access web.What is the purpose of <load-on-startup>explain its advantages & disadvantages? 94.Is it possible to access resources present in the context root directly? 75. uri & urn? 99.With in the servlet how we can access logical name of the servlet? 91.How many times we can call sendRedirect() method with in the same Servlet? 71.Where we have to place 3rd party jar files? 78.MF? 109. c) Remove an attribute? 4.xml? 104.With in the servlet how we can access Servlet initialization parameter? 92.xml? 83.xml? 77.What is the purpose of META-INF folder? 108.Explain the directory structure of a web application? 73.How to send ErrorCode programmatically? 105.class file Other than classes folder? 80. a) Adding an attribute? 2.xml directory? 81.What is the purpose of <mime-mapping>? 106.Can you specify any 10 tags of web.Where we have to place tag libraries inside web application? 82. b) Get the name of an attribute? 3.Explain about web.Explain.xml? 113.What is the purpose of an attribute? 116.Explain about <context-param>tag & <init-param>? 110.How we can access context parameters and servlet parameters with in the Servlet? 112.What is the purpose of Servlet initialization parameters and explain how to configure in web.Explain about MANIFEST.Is it possible to configure jsp's in web.What is the difference between url.Is WEB-INF folder mandatory for web application? 76.xml? 88.What is the purpose of <servlet-name> 86.How we can add cookies to the response? 72.If two Servlets having same<load-on-startup> values what will be happen? 95.Is it important the order of tags in the web.explain the methods to perform following activities? 1.Explain the cases where we should go for each scope? 118.xml? 101.When we have to configure jsp's in web.How many names are possible for a servlet in web-app? 87.What is the default welcome-file? 102.How we can get Contextpath and quereyString directly with in the Servlet? 100.If the required class file available in classes folder and lib folder jar file.Explain about of war file & the process of creation? 107.What is the scope of <context-param>&<init-param>? 114.xml? 89. then which one will get preference? 79.What are various scopes available for Servlets? 117.How we can declare context & Servlet <init-parameters>in web.What is the necessity of welcome-file and explain How to configure welcome files in web.What are the differences between Servlet initialization parameters& Context initialization parameters? 111.In which location we have to place static content? 74.xml? 90. difference between sendRedirect&forword? 70.How many types of url patterns are possible according to Servlet specification? 96.What is the ServletConfig object and explain the methods available in ServletConfig interface? 93. d) Modify the value of an attribute? 5.68.How to configure defult Servlet in web.What are the difference between parameters & attributes?classhierarchy? 115.How we can implement Redirection mechanism? 69. What are the various Session Management techniques are available? 144.What is the difference between getSession() & getSession(boolean b)? 146.What is the difference between forward() &include()? 124.How we can configure SessionTimeout in web.What are the default values of <dispatcher> tag? 134.How many possible ways we can get the RequestDispatcher? 122.To print the no of active session objects at server side which listener is responsible? 168.Explain Decorator design pattern? 141.In how many ways we can map a filter? 132.Explain with an example where getSession(false) is required? 147.What is the purpose of <dispatcher> tag? 133.What is the difference between Filter interface doFilter() & FilterChain doFilter()? 137. then what is the need of session and Request scopes? 120.Explain the purpose of Listener? 163.What is the difference between Session API & Cookie which approach is recommended? 157.What is the difference between obtaining RequestDispatcher from ServletRequest and ServletContext object? 123.xml? 131.Explain the types of wrappers? 140.xml? 150.How the SessionId is exchanging between Client & Server? 156.Define Session management? 149.By using which interfaces we can implement filter concepts? 129.To print hit count of the web application which listener is required to use? 167.119.How we can invalidate a Session? 148. What is the purpose of FilterChain? 130.By using which Methods we can implement URLRewriting? 160.BY using which methods we can identify under laying Session Management technique? 161.Explain the process of creating Session object? 145. URL Writing 8.What are allowed values of <dispatcher> tag? 135.What is the purpose of wrapper? 139.What is the difference between persistent and non persistent cookies? 158.How we can configure filter in web.Explain advantages & disadvantages of 6.How to know SessionCreation time & lastaccesed time? 152.Explain the Session Management Mechanism by SessionAPI? 153.What are various attributes added by web container while forwarding & including? What is the purpose of these attributes? 127.What is the purpose of filter? Explain the cases where exactly required? 128.What is the difference between <Session-timeout>and <SetMaxInactiveInterval>? 151.What is the intercepting filter design pattern? 138. cookies 7.What is the default session timeout? 154.What is URL Rewriting? 159.What is the difference between forward() &sendRedirect()? 125.Explain Session Management by using Cookies? 155.What is the purpose of RequestDispatcher? 121.If we store information in application scope by default it is available everywhere with in the web application.In filter chain in which order the filters will be executed? 136. Session API 162.What is the foreign RequestDispatcher & explain the process how we can get it? 126.What is the difference between HSAL & HSBL? .How to configure listener in web.What is the difference between ServletRequestListener and ServletRequestAttributeListener? 165.What are the various listeners are available according to Servlet specification? 164.Explain the cases where you used filters & wrappers in your previous project? 142.xml? 166.What is the need of Session Management? Explain cases where Session Management is required with example? 143. At what time listener classes will be instantiated? 178. What is a Scriptlet? 25. What is JSP ? Describe its concept. How is scripting disabled? 32. How to pre-compile JSP? 22. Explain the life-cycle mehtods in JSP? 13.169. Difference between _jspService() and other life cycle methods. 14 What is the jspInit() method? 15.Can we implement an interface in a JSP? 5 What are the advantages of JSP over Servlet? 6. What is a JSP declarative? 26. 2 . How can I declare methods within my JSP page? 27.How we can configure users in Tomcat? 182. Explain the differences between ASP and JSP? 8 . What is the difference between ServletContext and PageContext? 36 .Who is responsible to perform instantiation of listener? 177. Differences between Servlets and JSP? 7 . Why is _jspService() method starting with an '_' while other life cycle methods do not? 21. Can you make use of a ServletOutputStream object from within a JSP page? 38 . How can I override the jspInit() and jspDestroy() methods within a JSP page? 19 . How to Protect JSPs from direct access ? 10.What are the three kinds of comments in JSP and what's the difference between them? 29. Explain the benefits of JSP? 3.What are various event classes available in ServletSpecification? 174. Can I stop JSP execution while in the midst of processing a request? 9. The benefits of pre-compiling a JSP page? 23.xml? 173.At the time of application deployment to perform certain activities which listener is responsible? 172.How many JSP scripting elements and explain them? 24.What is the difference between declarative Security & programmatic security? 179.In your previous project what type of authentication used? JSP FAQs 1.In your previous project how you implement security? 183. What is the jspDestroy() method? 17.Explain about HttpSessionActivationListener? 171. What is the _jspService() method? 16. What is the difference b/w variable declared inside a declaration and variable declared in scriplet ? 28. Is JSP technology extensible? 4 . What is output comment? 30.By using which methods we can implement programmatic Security? 180.What is the purpose of <security-role-ref>? 181. Explain about translation and execution of Java Server pages? 20 . Is there a way to reference the "this" variable within a JSP page? 37 . How does JSP handle run-time exceptions? 34. What JSP lifecycle methods can I override? 18.Is it possible to configure more than one listener of same type? 175. What are the JSP implicit objects? 33. What's a better approach for enabling thread-safe servlets and JSPs? SingleThreadModel Interface or Synchronization? . What is a Hidden Comment? 31. Explain JSP API ? 11.What are various methods present in binding listeners? 170. How can I implement a thread-safe JSP page? What are the advantages and Disadvantages of using it? 35.What are various listeners which are not required to configure in web.What is the page directive is used to prevent a JSP page from automatically creating a session? 39.If you are configures more than one listener of the same type then in which order listener will be executed? 176. What are the lifecycle phases of a JSP? 12. What are the different scopes available fos JSPs ? 44.Differences between static include directive and include action ? Spring FAQs What is IOC (or Dependency Injection)? What are the different types of IOC (dependency injection) ? What are the benefits of IOC (Dependency Injection)? What are the advantages of Spring framework? What are features of Spring ? What is web module? What are the types of Dependency Injection Spring supports? What is Bean Factory ? What is the difference between Bean Factory and Application Context ? What are the common implementations of the Application Context ? How is a typical spring implementation look like ? What is the typical Bean life cycle in Spring Bean Factory Container ? What do you mean by Bean wiring ? What do you mean by Auto Wiring? What is DelegatingVariableResolver? How to integrate Java Server Faces (JSF) with Spring? What is Java Server Faces (JSF) . What are various attributes Of Page Directive ? 41 .Spring integration ? How to integrate your Struts application with Spring? What are ORM’s Spring supports ? What are the ways to access Hibernate using Spring ? How to integrate Spring and Hibernate using HibernateDaoSupport? What are Bean scopes in Spring Framework ? What is AOP? How the AOP used in Spring? What do you mean by Aspect ? What do you mean by Advice? What are the types of Advice? What are the types of the transaction management Spring supports ? What are the benefits of the Spring Framework transaction management ? Why most users of the Spring Framework choose declarative transaction management ? Explain the similarities and differences between EJB CMT and the Spring Framework's declarative transaction management ? What are object/relational mapping integratio6 module? When to use programmatic and declarative transaction management ? Explain about the Spring DAO support ? What are the exceptions thrown by the Spring DAO classes ? What is SQLExceptionTranslator ? What is Spring's JdbcTemplate ? What is PreparedStatementCreator ? What is SQLProvider ? What is RowCallbackHandler ? What are the differences between EJB and Spring ? . Can a JSP page instantiate a serialized bean? 48. Explain about autoflush? 42. when do use application scope? 45.Spring integration mechanism? What is Significance of JSF. How do I use a scriptlet to initialize a newly instantiated bean? 47 . How do you restrict page errors display in the JSP page? 43.40. What are the different scope valiues for the ? 46.In which situation we can use static include and dynamic include in JSPs ? 51.In JSPs how many ways are possible to perform inclusion? 50.How do we include static files within a jsp page ? 49. What can I do about it? I get an IndexOutOfBoundsException when I use SAAJ under JBoss.Do I need any other SOAP framework to run Spring Web Services? I get NAMESPACE_ERR exceptions when using Spring-WS.3? Does Spring-WS work under Java 1.1" when I use SAAJ under WebLogic 10. What can I do about it? Does Spring-WS run under Java 1.1" when I use SAAJ under WebLogic 9.6? Why do the Spring-WS unit tests fail under Mac OS X? What is SAAJ? What version of SAAJ does my application server support? I get a NoSuchMethodError when using SAAJ.4? Does Spring-WS work under Java 1. What can I do about it? I get an UnsupportedOperationException "This class does not support SAAJ 1. What can I do about it? Does Spring-WS run on IBM WebSphere? Why does Spring-WS only support contract-first? How do I retrieve the WSDL from a Service? What is web module? What is a BeanFactory? What is AOP Alliance? What is Spring configuration file? What does a simple spring application contain? What is XMLBeanFactory? What are important ApplicationContext implementations in spring framework? Explain Bean lifecycle in Spring framework? What is bean wiring? How do add a bean in spring application? What are singleton beans and how can you create prototype beans? What are the important beans lifecycle methods? How can you override beans default lifecycle methods? What are Inner Beans? What are the different types of bean injections? What is Auto wiring? What are different types of Autowire types? What are the different types of events related to Listeners? What is an Aspect? What is a Jointpoint? What is an Advice? What is a Pointcut? What is an Introduction in AOP? What is a Target? What is a Proxy? What is meant by Weaving? What are the different points where weaving can be applied? What are the different advice types in spring? What are the different types of AutoProxying? What kind of exceptions those spring DAO classes throw? What is DataAccessException? How can you configure a bean to get DataSource from JNDI? How can you create a DataSource connection pool? How JDBC can be used more efficiently in spring framework? How JdbcTemplate can be used? How do you write data to backend in spring using JdbcTemplate? Explain about PreparedStatementCreator? Explain about BatchPreparedStatementSetter? Explain about RowCallbackHandler and why it is used? . What can I do about it? I get an UnsupportedOperationException "This class does not support SAAJ 1. How can Hibernate be configured to access an instance variable directly and not through a setter method ? 49. . What is the difference between and merge and update ? 34. What are derived properties? 40.cfg. Hat does ORM consists of ? 5.lock() in Hibernate ? 27. What is the advantage of Hibernate over jdbc? 2. What are the ways to express joins in HQL? 24. Explain Criteria API 32. Why do you need ORM tools like hibernate? 7.session. Difference between session.Hibernate FAQs 1. What is the need for Hibernate mapping file? 12. Define HibernateTemplate? 36. What is the use of dynamic-insert and dynamic-update attributes in a class mapping? 45. What is Hibernate proxy? 48. What is the main difference between Entity Beans and Hibernate ? 9. What are the important tags of hibernate. What are the benefits does HibernateTemplate provide? 37. What is the difference between sorted and ordered collection in hibernate? 29. Explain about addjar() and addDirectory() methods? 55. What are Callback interfaces? 47.saveOrUpdate() and session. How do you map Java Objects with Database tables? 17. How can a whole class be mapped as immutable? 50. What Does Hibernate Simplify? 8. What is automatic dirty checking? 46. What do you mean by Named – SQL query? 30. What is the effect when a transient mapped object is passed onto a Sessions save? 53. What is ORM ? 4. Define cascade and inverse option in one-many mapping? 41. What is Hibernate Query Language (HQL)? 23. What is component mapping in Hibernate? 19.save() . What is the general flow of Hibernate communication with RDBMS? 11. How do you define sequence generated primary key algorithm in hibernate? 18. What role does the SessionFactory interface play in Hibernate? 15. Explain about the dirty checking feature of Hibernate? 52. What is Hibernate? 3. What are the Collection types in Hibernate ? 28.xml? 13. What is lazy fetching in Hibernate? With Example . What are the ORM levels ? 6. What are the types of Hibernate instance states ? 21. Transaction with plain JDBC in Hibernate ? 25. What role does the Session interface play in Hibernate? 14.update() and session. How do you switch between relational databases without code changes? 38. Difference between session. Explain about addClass function? 54.persist()? 43. what should we do? 39. Define cascade and inverse option in one-many mapping? 35. What are the most common ways to specify the Hibernate configuration properties? 16. How do you invoke Stored Procedures? 31. If you want to see the Hibernate generated SQL statements on console. What are the Core interfaces and classes of Hibernate framework? 10. What are the general considerations or best practices for defining your Hibernate persistent classes? 26. Explain about transaction file? 42. What are the types of inheritance models in Hibernate? 22. Explain about transparent persistence of Hibernate? 51. What’s the difference between load() and get()? 33. Difference between getCurrentSession() and openSession() in Hibernate ? 20. Explain about the id field? 44. How to write Customized Exceptions? 5. What is an object-oriented Programming? 3. What is constructor and how to initialize an Object? Inheretence 1. How we will handle Exceptions? 4. What are the methods are available in Object Class? 11. What is inheritance? 12. What is encapsulation? 7. Explain about addClass function? 62.56. What is the difference between abstract class and interface? Exception handling 1. What is class and object? 9. What is the effect when a transient mapped object is passed onto a Sessions save? 61. what are the types of the exceptions? 9. Explain features of Java? 4. What is function overloading ? 3. Explain about the dirty checking feature of Hibernate? 60. They can given some programs on Overloading concepts with Exceptions? Collection frame work 1. What is version checking in Hibernate ? 59. What is Marker interface? Polymorphism 1. What is super and this keyword? 2. What is difference between Abstract class and inner class ? 5. can you write one predefined exception code in real time manner? 11. What is difference between C++ and Java? 4. How many types of Exceptions and explain and given some examples? 3. What is difference between final. Explain about polymorphism? 2. What is main purpose of oops concept? 2. What is an Abstract class and interface? 3. Difference between Interface and Abstract Class? 4. Catch and Finally? 6. How to prevent concurrent update in Hibernate? 58. What is final Key word? 7. What is Abstraction ? 13. Explain about inheritance and polymorphism in hibernate? Abstract classes 1. what is immediate super class of RuntimException? 10. What is the difference String and StringBuffer and StringBuilder? Constructors 1. What are the oops concepts and explain them? 6. Features of java 1.5 version and explain them? 2. Encapsulation is keyword or class or interface? 8. What is Jvm? 3. They are given some programs on Try.finally and finalize() ? 8. Which version of java we are using? and what are the features in 1. Garbage Collection ? Oops concept 1. Explain about OOPs? 5. What is an abstraction? 2. How to Integrate Struts Spring Hibernate ? 57. Explain about Object class? what are the methods it can have? Tell me about tostring()? 10. What difference LinkedList and ArrayList? . What is Exception? Difference between Exception and Error? 2. What is difference Iterator and Enumeration? 3. Explain about init() method? 5. What is differance b/w ArrayList and Vector? 24. can you draw the Collection Hierarchy? 4. Can you write multi Threading program? 8. What is difference b/w HashMap and Hashtable? 23. Explain about servlet life cycle? 4. What is Synchronization? 6. Differentiate include file Vs include page? 7. How many ways are possible to create a Thread ? which way is better? JDBC questions: 1. what are drivers available? which driver you use in your project? 3. How will you provide thread safety in ArrayList? 9. Explain about Thread life cycle? 2. Explain about Servlets? what are the life cycle methods explain? 10. What is difference b/w Arrays and Collections? Threads 1. Explain about Servlets? what are the life cycle methods explain? 13. What is the Difference between Notify and NotifyAll methods? 4. What is collections? 12. 11. What is resource allocator? Servlet & jsp 1. Explain about SingleThreadModel in servlets? 12. Iterator and ListIterator? 11. Vector vs Array list? 21. What is Difference between Sleep and Wait methods? 3. What are types driver jdbc? 4. What is the purpose of ArrayList? 14. How will you provide thread safety in ArrayList? 20. can you write one multi threading programme? 10. Explain differences between yield() and join() methods ? 12. How we can Synchronize List and set? 10. Is the servlet Thread singleton? explain the reason? 3. Among Servlets and JSPs which is better? Where JSP Technology is best suitable. What is serialization? How can you achieve it?where you used in your project? 11. What is Difference between list and Set? 5. What is Difference between ArrayList and Vector? 6. write DataSource code? 2. Explain about collection overview? 22. When we use Enumeration. What is collections ? 17. What is difference ArrayList and Vector ? 16. What are methods available in Collection interface? 25. Session management techniques? 8. Differnce between Hashtable VS HashMap? 19. What is Iterator? 13. What is difference between Abstract class and interface? 18. What is enumeration? 15.2. What is Difference between Comparable and Comparator? 8. How many ways we are implementing Threads? which ways is better? 7. What is Yield method? 5. Is it possible to override service() method in Servlet? 9. How we can sort the elements in HashSet? 7. Among Servlets and JSPs which is better? Where JSP Technology is best suitable. if we call destroy() from service() what will happen? 6. What is difference between Jsp and Servlet? 2. What is Difference between Hashmap and HashTable? 9. . what is hibernate? 18. Explain about struts flow? 6. Tell me about jsp Elements? 15. What are the problems you faced while using hibernate in your project? 7. What are interfaces available in spring? 8. what are ejb sessions in ejb? 2. What is meant by component mapping? 6. Explain about Hibernate Architecture ? 4. Difference between Dialect and Driver? 13. What is IOC? 6. What are advantage using Spring? 4. Explain about Hibernate Session Factory? 26. What is spring? 2. What is ORM? 20. what are actions in struts? 2. What is DispatchAction? where did you use in your project? where it configure write code? 8. How to write form bean tags in your struts-configuration file? 9. Explain about Hibernate Architecture? 27. Can we override execute() method in Struts? 5. What the difference b/w Spring and Ejb? 3. What is meant by spring? 9.14. What is mutable and immutable? EJB questions 1. what is ejb? . what is meant by inheritance mapping in hibernate? 23. Explain about Hibernate mappings ? 5. Is it possible to write hibernate application without using hibernate configuration file ? 15. What are Action classes available in struts? 7. what is meant by component mapping?2)what is meant by component mapping? 22. Explain about inheritance & polymorphism in hibernate? 3. who do you know your ejb application can have stateful or stateless? 3. Explain about hibernate tools? 17. Is it possible to write hibernate application without using hibernate mapping file? 14. What is difference b/w scriptlet and declaration? Spring 1. what are the problems you get doing hibernate projects? 24. what is jndi? 4. I have 4 action classes i want get second action class how can i get it? where are you configure? can u write code ? Hibernate 1. What is difference between First level cache and Second level cache? 10. How can we connect more than one database in hibernate applications? 12. how to declare exceptions in struts? 4. what is include action? 3. What are packages avilable in spring? 5. Explain about Hibernate mappings? 25. What is disadvantage using hibernate? 19. Hibernate Assction mappings tell me ? can you give real time examples? 21. What is the difference Session and SessionFactory? 11. Explain differences between get() and load()? 9. Explain about Persistance class life cycle states in hibernate? 16. What is Method injection? 7. Explain about Spring? Struts questions 1. Explain about Lazy Loading? 8. Explain about Hibernate SessionFactory ? 2. Catch and Finally? 11) Explain about Thread life cycle? 12) What is Difference between Sleep and Wait methods? 13) What is the Difference between Notify and NotifyAll methods? 14) What is Yield method? 15) What is Synchronization? 16) can you draw the Collection Hierarchy? 17) What is Difference between list and Set? 18) What is Difference between ArrayList and Vector? 19) How we can sort the elements in HashSet? 20) What is Difference between Comparable and Comparator? 21) What is Difference between Hashmap and HashTable? 22) How we can Synchronize List and set? . What are version using in your project? 7. write a program for conversion of little endian to big endian? 11. How can you achieve encapsulation your project? 4. 4. Describe how procedure of c program -like compilation every thing. can u write a print a statement with out using print function ? 13. 1) What are the oops concepts and explain them? 2) They can given some programs on Overloading concepts with Exceptions? 3) Difference between Interface and Abstract Class? 4) Which version of java we are using? and what are the features in 1. tell memory structure allocation process and how it works? 7. what is macro write a program to find largest b/w 3 elements by using macro? 5. What are performance issues you have to faced in your project? Weblogic server 1. what is splay tress and some question about tress? 12. How to handle Exceptions in your project? 8. What are exception we get doing hibernate in your project? 10 Why we are going to hibernate? 11. How can you increase connection pool-size in web logic? Programs 1. Can you draw your project architecture? 2. what is DMA? what it means? 8. here i list out some Questions i faced in My Interview. what is difference b/w structure and union? 10. Tell me about your Second project and draw its architectu 5. Write Program in java to convert the decimal number to binary number form? Core Java questions 1. What is diamond problem in java? 9... what is Cloning? why we are using Cloning concept? and How many types of cloning? sir. put vs get? 2.Project Manager questions 1. They told me to write a program to find mid point of rectangle by just giving x1 x2 and y1 y2 ? Misllinious 1. diff b/w in declaration and definition? 6. How to provide security in your Project?and as well as your module also? 6. what are concepts in 1.5 version and explain 5) what is Cloning? why we are using Cloning concept? and How many types of cloning? 6) What is Exception? Difference between Exception and Error? 7) How many types of Exceptions and explain and given some examples? 8) How we will handle Exceptions? 9) How to write Customized Exceptions? 10) They are given some programs on Try. Write program in java to check whether the given number is perfect number or not 2.5 java? 3. What are issues you got in your projects? 3. what is function pointer? 9. Explain about polymorphism? 3. What is mutable and immutable? 8. Explain about Hibernate Architecture? 7. Explain about Hibernate Session Factory? 5. Explain about inheritance and polymorphism in hibernate? 6. Explain about inheritance & polymorphism in hibernate? 3. What is the purpose of ArrayList? 4.0? 13) How you provide the validations? While Coming to PROJECT MANAGER ROUND 1) Explain about your project? 2) How many Modules are there in your project? 3) What's your Role and Responsibilities? 4) How big is your Team Size? 5) Tell me Some Exceptions you faced in your project? 6) Which type of Complexity code you written in your project 7) Which Version Controller you used? 8) Which type of validations you done in your Project? Etc. Iterator and ListIterator? 24) What is the difference String and StringBuffer and StringBuilder? 25) what are the methods are available in Object Class? After these they come to the Advanced Java(Jdbc. jsp) 1) How many Drivers are there in Jdbc? Which Driver we are using in our project? 2) Can you write the code for Connecting the database? 3) What is Connection pooling mechanism? How we can implement? 4) Difference between Statement and PreparedStatement? 5) What is Callable Statement? 6) What is Servlet Life Cycle? 7) If iam sending the request at in servlet life cycle which method will be called? 8) What is the difference between Forward and include Mechanisms? 9) What is the difference between Forward and SendRedirect Mechanisms? 10) What is the difference between Servlet Config and servlet Context? 11) What are the Implicit objects in jsp? 12) How we can Handle the Exceptions in Jsp? 13) What are the scopes in jsp? While coming to Struts 1) Explain Struts Flow? 2) What is I18N? 3) What are the Actions are available in Struts? 4) What is the difference between DispatchAction and LookupDispatchAction? 5) What is Switchaction? 6) What is MVC? 7) Struts follows which MVC Architecture? 8) What is FrontContoller? 9) What is Singleton Design Pattern? can you write some code about this? 10) What is DAO and Explain? 11) Which Tags are there in Struts-config. Explain about Hibernate mappings ? .xml file? 12) Difference between Struts1.2 and Struts2.Hibernate Interview Questions by Mr. Servlets. Once again I Thanks to Durga sir. What are performance issues you have to faced in your project? HCL . Explain features of Java? 2. Nagoor Babu Sir and Ravindra Sir. 1. Your's N.23) When we use Enumeration.Venkatesh. 1. Explain about Hibernate SessionFactory ? 2.Nagaraju (27-3-2010) with 3+ years Java Experience. Explain about Hibernate Architecture ? 4. Differentiate include file Vs include page? 5. What is ORM? IBM Interview Questions by Mr. How will you provide thread safety in ArrayList? 5. Differnce between Hashtable VS HashMap? 4. How can we connect more than one database in hibernate applications? 12. what is hibernate? 18.5 java? 12. what are drivers available? which driver you use in your project? Servlets question 1. can you write one multi threading programme? JDBC questions: 1. Is it possible to write hibernate application without using hibernate configuration file? 15. What is difference between First level cache and Second level cache? 10. can you write one predefined exception code in real time manner? 9. Explain about Object class? what are the methods it can have? tell me about tostring()? 6. Session management techniques? Spring questions: . What is meant by component mapping? 6. What is disadvantage using hibernate? 19. Explain about OOPs? 3. Is it possible to write hibernate application without using hibernate mapping file? 14. Explain about Persistance class life cycle states in hibernate? 16. Explain about hibernate tools? 17. Explain differences between get() and load()? 9. what are the types of the exceptions? 7. put vs get? 10. if we call destroy() from service() what will happen? 4. Vector vs Array list? 11. Explain about servlet life cycle? 2.5. What is the difference between abstract class and interface? 2.Nagaraju with 3+ years Java Experience Core Java questions: 1. Explain about init() method? 3.Nagaraju with3+yearsJava Experience Technical questions: 1)What is Spring? 2)What the difference b/w Spring and Ejb? 3)What are advantage using Spring? 4)How many ways we are implementing Threads? which ways is better? 5)What is difference between Jsp and Servlet? 6)Is the servlet Thread singleton? explain the reason? 7)Can you write multi Threading program? 8)What are packages avilable in spring? Project Manager round: 1)How to provide security in your Project? and as well as your module also? 2)What are version using in your project? 3)How to handle Exceptions in your project? 4)What is diamond problem in java 5)What are exception we get doing hibernate in your project? 6)Why we are going to hibernate? ITC Interview Questions by Mr. What is the difference Session and SessionFactory? 11. Difference between Dialect and Driver? 13. what is immediate super class of RuntimException? 8. What are the problems you faced while using hibernate in your project? 7. Explain about Lazy Loading? 8. what are concepts in 1. write DataSource code? 2. Explain about Oops? 3. What are Action classes available in struts? 11. What is differance b/w ArrayList and Vector? 18. Is it possible to override service() method in Servlet? 2. Explain differences between yield() and join() methods ? T C S Interview Questions by Mr. Explain about Servlets? what are the life cycle methods explain? 6. How many ways are possible to create a Thread ? which way is better? 5. What is difference b/w scriptlet and declaration? 9. Explain about collection overview? 16. Explain about SingleThreadModel in servlets? 15. How to write form bean tags in your struts-configuration file? 13.1)What is IOC? 2)What is Method injection? 3)What are interfaces available in spring? 4)What is meant by spring? EJB questions: 1)what are ejb sessions in ejb? 2)who do you know your ejb application can have stateful or stateless? 3)what is jndi? 4)what is ejb? Hibernate questions: 1)Hibernate Assction mappings tell me ? can you give real time examples? 2)what is meant by component mapping?2)what is meant by component mapping? 3)what is meant by inheritance mapping in hibernate? 4)what are the problems you get doing hibernate projects? Struts questions: 1)what are actions in struts? 2)what is include action? 3)how to declare exceptions in struts? Project Manager questions: 1)Can you draw your project architecture? 2)What are issues you got in your projects? SOCIETE GENERALE Interview Questions by Mr. Tell me about jsp Elements? 8. What is difference b/w Arrays and Collections? Virtusa Interview Questions by Mr. How can you increase connection pool-size in web logic? 5. Among Servlets and JSPs which is better? Where JSP Technology is best suitable. Explain about Spring? 23. What are methods available in Collection interface? 19.Nagaraju (27-3-2010) with 3+ years Java Experience. What is serialization? How can you achieve it?where you used in your project? 20.Nagaraju (27-3-2010) with 3+ years Java Experience. 1. What is the Hibernate? What are files we have requires doing a hibernate application? 2. 1. Explain about Hibernate Architecture? . 7. Can we override execute() method in Struts? 3. What is difference b/w HashMap and Hashtable? 17. Tell me about your Second project and draw its architecture? 2. Explain about struts flow? 10.Nagaraju(20-3-2010) with 3+ years Java Experiance 1. How can you achieve encapsulation your project? 22. What is DispatchAction? where did you use in your project? where it configure write code? 12. I have 4 action classes i want get second action class how can i get it? where are you configure? can u write code ? 14. What is Marker interface? 21. Encapsulation is keyword or class or interface? 4. Explain about Hibernate mappings? 4. based on your guidence i got this offer and in IBM also. I attended scjp and scwcd classes.. What is Abstraction.. In technical Round the interviewer took me the interview for 2hours first he asked to me first tell me about myself and after that he asked me about the project and then he started to ask me questions on Core Java. A Thread object has a method called notify().. How to connect more than one database in Hibernate? 19. This is Mahaboob Basha. after they conducted HR Round. which of the following best maps to the "front controller"? 4.. system. I got the offer in Virtusa on 25th Oct. How do you configure using spring mvc with DAO class? 6.. Explain about Servlet life cycle ? 15.. try{ some code } catch(Exception e) { some code } finally{ some code } which one is optional? 12. What is the difference b/w extends Thread class and implements Runnable interface? 14.What are the oops concepts and explain them? 2. Explain your project flow? What technologies used in your previous project? 4. try{ some code. here i list out some Questions i faced in My Interview. Explain about Spring Framework features? 5. In Struts. inheritance polymorphism? 7.If we are average in core java on that time they asked some what difficult questions on J2EE.If we are very good at in core java then they asked simple questions on J2EE. About my Technical Round.. Explain differences between Abstract class vs interface? 10. First they conducted the Written Test Round after that Technical Round after they conducted Project Manager Round. Which configuration changes are required and which classes we have to use? 20. And I could remember some of the questions 1. 2010. Explain Singleton Design pattern? 18. One question on Hash Map 5. 1. one question on the directory structure of jar file. What is AutoBoxing and AutoUnboxing ? Can you Explain with real time example? 9. In this round I got around 19marks and 16 marks is the cut off.What is mean by Polymorphism and what is the difference between static and dynamic polymorphism? .exit(0).. sir.. What is Sax parser and Dom parser? Mahaboob Basha Interview experience@Virtusa with 2+ years experience Dear Durga Sir. I want change my database from Oracle to MySQL in hibernate. (true/false) 2. How to include one jsp into anther jsp? Which tag we can use for this purpose ? 16. So I Really Thanks to Durga sir and Nagoor Babu Sir. What are Checked vs Unchecked Exceptions? 8. Interview Process in Virtusa is . Explain about Struts? 17. Which tools you used in project? 21..So they mainly Concentration on Core Java. Which kind of ActionForm doesn't need to implement setter and getter methods by developer? 3. 2-3 questions on servlets and 2-3questions on jsps and 1-2 questions on struts and 1question on spring. One question on Hash Set 6.And then he will ask only Struts Flow in struts.. What are version control tools used in your project? Explain about check-in and check-out? 22. 7. About the Written Test In written test they gave the question paper consisting of 20 questions in which about 10-12questions are on core java. How to build modules in your project? Are you used any tool for this? 24. } Catch(Exception e){ Some code } finally{ some code } what will happen? 13. Explain differences between HashMap and Hashtable? 11.3. Around 3-4 questions on programs of core java which are very easy. What is your team size? 23. Difference between final.What is the Difference between Notify and NotifyAll methods? 13.Difference between Interface and Abstract Class and where did u used interface in your project? 6.Tell me something about Enumeration.finally. Iterator and list Iterator? 22.What is Exception? Difference between Exception and Error? 8..In ur project where did u used the Array List? 17.Can u tell me something about the collections? 21.What is mean by checked and unchecked Exceptions? 9..Which version of java we are using in your project? and what are the features in 1.What is Synchronization? 14.What is the difference String and StringBuffer and StringBuilder? 23.catch…finally type questions? 10.Difference between Hash Map and Hashtable? 19.What is difference between Array List and Vector? 16.He asked me about Try.Explain about Thread life cycle? 12.finalize? 11.catch. Catch and Finally and he asked different control flow of try.What is mean by immutability? After these he come to the J2EE 1) Can you write the code for Connecting the database using JDBC? 2) What is Connection pooling mechanism? How we can implement? 3) Difference between Statement and PreparedStatement? 4) What is Callable Statement and can u write program for that? 5) What is Servlet Life Cycle? 6) What is the difference between Forward and include Mechanisms? 7) What is the difference between Forward and SendRedirect Mechanisms? 8) What is the difference between Servlet Config and servlet Context? 9) What are the Implicit objects in jsp? 10) How we can Handle the Exceptions in Jsp? 11) What are the scopes in jsp ? While coming to Struts 1) Explain Struts Flow? 2) What are the features of struts 1.xml file? 9) Can explain about the validations and in your project where did u used the validations? While Coming to PROJECT MANAGER ROUND 1) Explain about your project? 2) How many Modules are there in your project? 3) What's your Role and Responsibilities? 4) How big is your Team Size? 5) Tell me Some Exceptions you faced in your project? 6) Which type of Complexity code you written in your project 7) Which type of validations you done in your Project? 8) Have you helped your team member in your project? 9) If anything dispute arises between your college and you then how will u handle that? 10) If anything dispute arises in your work and personal work then how will u handle it? While Coming to Hr Round .x version? 3) What are the Actions are available in Struts? 4) What is the difference between DispatchAction and LookupDispatchAction? 5) What is Switchaction and where did used in your project? 6) What are the parameters used in the ActionForward execute()? 7) What is Singleton Design Pattern? can you write some code about this? 8) Which Tags are there in Struts-config.Can u explain about the Stack? 20.Differnce between Comparator and comparable? 18.5 version? 7.3.What is mean by collection frame work and explain the complete hierarchy? 15.try.3.What is mean by singleton class and can u write a program? 5.They he asked about the overriding and method hiding? 4. .like that in strut2 have any thing ? 29)How many modules you know in Springs ? 30)why Spring ? 31)what is the difference between load() of JS and ready() method of Jquery ? 30)how you can disable some text in JS ? 31)why HQL .. how many objects created ? 13)What is immutable ? 14)What is the difference between Collection And Collections ? 15)Expalain Collection heirarchy ? 16)why List.setName("ramesh").Comparator? 18)Expain methods of Comparable and Comparators? 19)class Employee{ HashSet hs=new HashSet().Transaction etc.notify() and notifyAll() methods are in Object class instead of Thread class? 5)explain exception structure ? 6)we can implement try block with out catch? 7)can we stop finally block execution ? 8)what happends if return statement place in exception handling? 9)What is the difference between String and StrinBuffer ? 10)String s="abc" s="xyz" then whats the value of s? 11)String s="xyz" s1="xyz" how many objects created ? 12)String s="abc" String s1=new String("abc").What’s your strength and weakness? 4.add(new Employee().Session. hs.What is the package you are excepted? 3.Can u tell about yourself and your experience? 2. Criteria ? 32)How Map works ? 33)What is Serialization? why serialization ?how you can use it ? 34)What is marker interface .setName("ramesh").1.eventhough we have abstract class ? 4) Why wait() .add(new Employee()... Nagoor Babu Sir Date:9-9-2014 TCS 2+years very good Java interview quetions ================:=======================:1)What is difference between abstraction and encapsulation ? 2)how ways to acheive abstraction in java ? 3)why interface . Wt is diff b/w JDBC and Hibernate .Set. } how many Employee objects Set contains ? 20)How you can create SessionFactory object in your project ? 21)Expain transaction in hibernate ? 22)how you can map list in mapping file? 23)expain one to many mapping in hibernate ? 24) how to call procedures in hibernate ? 25)how to integrate hibernate with Spring ? 26)how to integrate Struts with Hibenate ? 27)expain HibernateTemplate ? 28)in hibernate we have SessionFactory.Map ? 17)What is Comparable. hs.When will u join the company? Once again I Sincerely Thanks to Durga sir.why marker interface ?give me some Examples ? 35)Difference between ServletContext and ServletConfig ? 36)What are implicit objects in JSP ? 37)tell me something about your current project ? Phonex It Solutions: 1. { Static void m() { sop(“m”) } Void m() sop(“m1”) } } Class mypro { Psvm() { m(). In eclipse how to establish link source files to classes folder 9. How to perform unit testing? 2. Tell jsp tags 4. } }what happen? GSS Infotech Solutions 1. how to retrieve in jsp program 2. What is log4j and its main advantage? 7. Write MVC and explain 3. Wt is ActionServlet 3. How to handle exceptions 5. What is ur project architecture? Broadridge : 1. What is MVC arch 2.v. How to move your developed files to testing dept 3. What is ur version control and advantages 8. Which jdbc driver u r using ? why? 6. Write a trigger. Bang (18-08-2012) F2F 1. What is Aspect Dell 1. How to integrate struts and spring 4. whenever the system has less memory to store all files? 4. What is ant? Write a ant scripting to load required jars automatically at runtime. Explain p. Write update query to update all employee sal 10% increase 3. What is controller why 5. What are joins? 5. Class program 8. What is framework ? why? 13. What r joins and explain? 12.xml and use of it? 11. what is IOC? 2. What is web. Is sugestable java code in jsp 5. Explain about validator framework IBM. What is AOP 7. Can u create object for system class? 3. What is front design of ur project? 6.main(String arg[]) why static? 7. We have collection object type string. procedure 6. What is javabean why 4.s.2. What is main advantage of log4j . What will happen if u compile jsp program where it is stored? 10. What are scriptlets in jsp and wt is problem and wt is alternative 7. How to initialize serializable classes 3. b. it contains id. Expections Interview Questions – Syntel. If we implement polymorphism then inheritance is defeault: true or false 8.xml 4. We are not extending String class from our class why? (String s= “something”) 7. IBM Telephonic 6. Explain method overloading and overriding Find output: Class base{ Public void m(Object o){sop(“base”). maven. How to debugging in eclipse 2.status[pass. Which version controller ur using 7.} 1. StudentList<Student> . How to reverse the collection objects Skype video conference with above company 1. Diff between generic servlet and httpservlet 6. Explain about ant.marks. How to integration done ur project 3. b.} } Class derived extends base{ Public void m(String s){soop(“derived”). Can we use static serialization 5. Log4j main use and assertions 5. Write a criteria query that has two pojo classes. Write a program that has List obj. Can we synchronized an arraylist object 9. Web. Diff between interfaces and abstract classes 2. Diff between servlet and jsp 3. Servlet object creation 5.4. Diff between static and non static 4. What happen in jsp compilation 4. What is httpsession 5. What is method for sorting 8.name.m(new String). jquery.} } Public static void main(String arg[]){ Base b = new derived(). What are return types of sql quaries 9. How to use serialization concept in ur project ? if not used what happened? 2. Explain validations in struts 3.Student and Subject now query for students who are associated with maths subject Open Symphony pune(24-09-12)Tel 1.javascript 6. Why Java as OOP language? . Is arraylist inserted orderd? Hashmap? 2. How to compare employee objets 10. Method orriding Infinite Computer sol(22-09-12) Tel 1. How to initialize ur hibernate dao related classes. 4. What are implicit object and their datatypes 6.m(new HashMap). In jsp how to propagate error messages 3. What are interfaces of collections Tavant Technologies(1-09-12) 1. Diff between comparable and comparator 11. Sql queries 5.fail] now I want student list who are passed 2. 12. 34.0 and JDBC 3. 26. 17. 14. and advantage of that? What are the different between java 1.an. 16. 11. 22.xml? What are the problems faced in the current working project? Abstract design pattern code? Object class methods? What are the features of JDBC 2.the. 24. 10. 35. 13. 9.0? You performed any java testing? Is needed? Explain about MVC design pattern? What are the core classes of your project? Explain about hibernate mapping xml file? Struts flow in your current project? What is your job in Design Phase? Chennai 1)explain your current project? 2)how to configure lazy loding? 3)wher you are using collections in your project? 4)can you chang the arraylist values? how can you change? 5)explain MVC architecture? 6)where your using hibernate in your project? 7)what is struts actionclass explain? 8)explain exception and error? 9)which type of exceptions handle in your project? 10)explain stack overflow and heap? 11)which type of exceptions rised in your project? 1)can we extend string class? 2)what is an abstract class? 3)can we write two constructors in abstract? 4)one to one relationship in hibernate how to write lazy loding in hibernate? 5)write a program string by word with out using stringTokenizer? 6)what is the use of flush() method in Hibernate? 7)what is evit() method and expalain them? 8)what is the diff b/w abstract and interface? 9)what is use of final&finalize? 1)write a program to print the given String is pallindrom or not? 2)write a program the given String is Sorting order in Desinding? 3)write a program to print the FibnoicSeries? 4)write a program String s="this. 19.is. 20.have. JRE? How to use JUNIT in your project? Why web. 8. 32. 15.. 27.to. 18. One pojo - how to define directory structure? What is prepared statement. 21. JDK.work. 33. 23.home".count the no of commas? 5)write a program on userdefined exceptions or custom exceptions? . 29. 36. 25. ect How config Hibernate? Difference between SQL and HSQL? Collections and Collection? Hsahmap and Hash table? Collections hierarchy? Servlet life cycle? JSP life cycle? How to connect DB by using MySQL? Struts Flow? One jsp. Java 1.7. 31.6? What is the main difference between core java and advance java? What is the difference between JVM.4. 28.5 and Java 1. 30. One Servlet. Main difference between C++ and Java? Inheritance types with real time examples? Polymarphim real time example? Abstract class and Interface . BufferedReader buf = new BufferedReader(is). 8)what is context? a)public interface Context This interface represents a naming context. which consists of a set of name-to-object bindings.in).2) Second-level cache Second-level cache always associates with the Session Factory object. Names 1)write a sample code in customexceptions? a) import java. Hibernate uses this cache by default. Since the objects are already loaded in the cache. A map cannot contain duplicate keys: Each key can map to at most one value. it processes one transaction after another one. 1. 3)what is iterator how to use hashmap? 4)what is lazyloding() 5)what is diapatchaction? 6)what is garbagecollection? a)When a Java object becomes unreachable to the program. 1)what is map? a)A Map is an object that maps keys to values. That is instead of updating after every modification done in the transaction. then it is subjected to garbage collection. 2)what is connection pooling? a)It's a technique to allow multiple clinets to make use of a cached set of shared and reusable connection objects providing access to a database. means wont process one transaction many times. The Map interface follows.println("Enter the word you cannot spell: "). While running the transactions. Mainly it reduces the number of SQL queries it needs to generate within a given transaction. It contains methods for examining and updating these bindings. This is a software process that converts the compiled Java byte code to machine code.*. Here. //-------------------------------------------------------public static void main (String args[]) { InputStreamReader is = new InputStreamReader(System.io. so that those objects will available to the entire application. It models the mathematical function abstraction. // A Java application to demonstrate making your own Exception class // This program catches the exception when the word "client" is // entered incorrectly. System. it updates the transaction only at the end of the transaction. whenever an object is returned by the query. .out. Connection Pooling feature is supported only on J2SDK 1. It provides the cross platform functionality to java.6)write a program to print given no is prime or not? 7)What is First and Second Level caching in Hibernate? First-level cache always Associates with the Session object. 7)what is jvm? a)JVM is the main component of Java architecture and it is the part of the JRE (Java Runtime Enviroment) . don’t bounds to single user. Later we will discuss about it. Here we can use query level cache also.4 and later releases. The main use of garbage collection is to identify and discard objects that are no longer needed by a program so that their resources can be reclaimed and reused. In this way the second level cache works. at that time no need to go for a database transaction. in between it loads the objects at the Session Factory level. public class TestException { static String s = "". equalsIgnoreCase("client")) System.getError()). public String getError() { return mistake. It returns the error message.initializes instance variable to unknown public SpellException() { super(). public SpellException(String err) { super(err).try { s = buf. //---------------------------------------------// Default constructor . // this method throws SpellException } catch (SpellException se) // but it is caught here { System.out.readLine(). class SpellException extends Exception { String mistake. // Note how this method specifies that it throws such and such // exception.getMessage()).out.println("OK").out. // save message } //-----------------------------------------------// public method. // call super class constructor mistake = err. callable by exception catcher. } } // end main class //*********************************************** // Custom exception class that descends from Java's Exception class. } catch (IOException e) { System. else throw new SpellException("Cannot spell client"). } try { checkSpelling(). Does not have to be caught here. } } // end main //---------------------------------------------------------// Check spelling of typed in word. // call superclass constructor mistake = "unknown". } } . Throw exception if wrong.println("Spell exception was: " + se. } //----------------------------------------------// Constructor receives some kind of message that is saved in an instance variable.println("IOException was " + e. private static void checkSpelling() throws SpellException { if (s. */ //iterate through tokens . /* countTokens() method returns the number of tokens remaining from the current delimiter set.out. /* Reverse string by word using StringTokenizer example. public class ReverseLine { public static void main(String[] args) { String strLine = "Java Reverse string by word example".util. } } /* Output would be Reversed string by word is : example word by string Reverse Java */ --------------------------------------------------------------------------------------------------------------------------------------------------------/* Java StringTokenizer count tokens example This example shows how to count remaining tokens of java StringTokenizer object using countTokens() method.hasMoreTokens()) { strReversedLine = st.StringTokenizer.2)using arrylist add values and copy that values in to map? 3)What are the methods in Object class? a)There are lots of methods in object class. public class StringTokenizerCountTokensExample { public static void main(String[] args) { //create StringTokenizer object StringTokenizer st = new StringTokenizer("Java StringTokenizer count Tokens Example"). } System. //specify delimiter as " " space StringTokenizer st = new StringTokenizer(strLine. */ import java.StringTokenizer. This example shows how to reverse a line or sentense using Java StringTokenizer and String classes. while(st. Please note that invoking countTokens() method does not advance the current position. */ import java.println("Reversed string by word is : " + strReversedLine). " ").util.nextToken() + " " + strReversedLine. String strReversedLine = "". It calculates the number of times StringTokenizer's nextToken() method can be called before it generates an exception. the list of some methods are asclone equals wait finalize getClass hashCode notify notifyAll toString. hasMoreTokens()) { stack. public class Age { public void decide(String s0throws NumberFormatException. } StringBuffer revStr = new StringBuffer().out.parseInt(s).pop()).nextToken()).println(st. if(age<=0) .append(stack. revStr. Stack stack = new Stack(). System. } } --> package ap. The output of this code fragment will be Original string: Reverse this string Reversed string: string this Reverse 5)write a program on userdefined exceptions or custom exceptions? package na.println("Original string: " + test). } System.append(" ").out.println("Remaining Tokens : " + st. impoer na.out.println("\nReversed string: " + revStr).out.Nage { int age=Integer. System. public class Nage extends Exception { public Nage(String s) { super(s).while(st. while(strTok. while(!stack.countTokens()).push(strTok.empty()) { revStr.nextElement()). } } } /* Output Would be Remaining Tokens : 5 Java Remaining Tokens : 4 StringTokenizer Remaining Tokens : 3 count Remaining Tokens : 2 Tokens Remaining Tokens : 1 Example */ Reversing a String by Word String test = "Reverse this string".Nage. StringTokenizer strTok = new StringTokenizer(test).hasMoreTokens()){ System. .print("Enter String: "). System.!"). class CDemo { public static void main(String[]args) { try { String s1=args[0].out. } } } write a program to print the given String is pallindrom or not? import java. Ao.. } catche(ArithmeticException ae) { System.println("PASS VALUES THROUGH COMMAND PROMPT.pritln("PASS ONLY INTEGER VALUES.out. throw(na).println(e).println("PASS INTEGER VALUES ONLY.out.i>=0.Age().println(na). String reversedSt="". } else { System.next(). String st=input. } } } import na..length-1.!").. ap...*.. String str[]=st.in). } catche(NumberFormatException nfe) { System..decide(s1).out.out. } catch(Exception e) { System. import ap.!").Age Ao=new ap. public class CheckPalindrome{ public static void main(String[]args){ Scanner input=new Scanner(System.{ Nage na=new Nage("U HAV ENTERED INVALID AGE.util. for(int i=str.split("").!"). } cache(Nage na) { System.out.i--){ reversedSt+=str[i].. u hav entered valid age.out.Age..Nage.!"). } catch(ArrayIndexOutofBoundsException aioobe) { System.println("ok. out.println("Enter string: ").nextInt().util. class SortList { public static void main(String[] args) { Scanner input=new Scanner(System. System.i<5.out.i++){ System. System. Collections.i++){ String name=input. ArrayList<String> list=new ArrayList<String>(). return rev.sort(list).*.i++){ System. list. } } } import java.out.add(name). for(int i=1.println(list.in). } public static void main(String[]args){ Scanner input=new Scanner(System.get(i).println(fibonacciSeries(i)).*.println("String is palindrome").out. else if (n == 2) return 1.i<list.util.*. } } } write a program to print the FibnoicSeries? import java. } public static void main(String[] args) throws Exception { Scanner input=new Scanner(System.print("Enter value of n: "). } System. System.toString()). } else{ System.size().util.println("Enter names of 5 Cricketers: "). public class Fibonacci{ public static int fibonacciSeries(int n) { if (n == 1) return 1. for(int i=0.nextLine(). public class ReverseString{ public static String reverse(String st){ String rev = new StringBuffer(st). for(int i=0.in).i<=num.reverse().println("String is not palindrome"). .out. else return fibonacciSeries(n-1) + fibonacciSeries(n-2). int num = input.in). } } } import java.out.equalsIgnoreCase(reversedSt)){ System.println("Names of 5 Cricketers in sorted order: ").out.toString().} if(st.out. } else { return n * findFactorial(n . } } Java Custom Exception Sample Code package com. System.1).*. } } } write a sample code in customexceptions? class MyAppException extends Exception { private String message = null.out.String str=input. this. class Factorial{ public static int findFactorial(int n) { if (n == 1) { return n. } } static void myTest(String str) throws MyAppException{ if(str == null){ throw new MyAppException("String val is null").nextInt().println("The factorial of " +num+" is : " + findFactorial(num)). } @Override public String toString() { return message.exceptions.out. public class MyOwnException { public static void main(String[] a){ try{ MyOwnException. System. System. public MyAppException() { super().nextLine(). } catch(MyAppException mae){ System.println("Inside catch block: "+mae.in).getMessage()). .message = message. } public MyAppException(Throwable cause) { super(cause). } } public static void main(String[] args) { Scanner input=new Scanner(System.out.out. } public MyAppException(String message) { super(message).print("Enter number: "). int num=input.util.myTest(null).myjava. } } import java.println("Reverse: " + reverse(str)). Rajesh 4. Roles & Responsibilities. Abstraction. February 2000 3. Current Working profile. Joins. Ravi 5. 3. Hr Executive : Anuradha Round . Salary . 2. } } Example Output Inside catch block: String val is null Winfo ware technologies. Abstract classes.} @Override public String getMessage() { return message. Application of project to the architecture. Month. Rajiv 3. Of Project 4. Architecture. Encapsulation. explain) tbl_employee Eid Name 1 Raju 2. OOPS 10. 12. April 4000  Select All Employee Names.1: Technical interview. General 1. Inheritance (Multiple) Data Bases 13. January 1000 2. (Types. March 3000 4. Ramu tbl_salary Id Month Salary 1. 11. 20. Briefly introduce yourself. eg: string – 12548796254 if we want to extract last 4 characters. 3. DML? DDL? – (difference) 5. OOPS. Hr Executive : Questions:Telephonic interview (14:30 hrs). O/P should be 54269. Select All Employee Names. Web Technologies 4. Asp. O/P should be 4526. Project? (explain briefly). Write a method for extracting last n characters from a string & returning them in reverse order. Explain your current project briefly. Hr Executive : Sumathi Round . 91} O/P should be:{51. Month. OOPS concepts used in your project. 74. 63. 47. Have you faced any particular challenges in current Project? Data Bases 4. Briefly introduce yourself. Technical person : Venkat Round-1: Technical interview Questions: General 1. 6. 2.1:Technical interview. Programming 1. Are you looking for job change? VENSOFT TECHNOLOGIES INDIA PVT LTD. Trigent Software solutions. 3. Application of architecture to current project. Delete – Truncate (difference) Is delete DML / DDL? Is truncate DML / DDL? General 8. eg: array [] = {15. OOPS 4. Round . 2. Write logic to display elements of an array in reverse order. 8. 2. How much do you rate yourself in HTML on a scale of 10? . 7. Main Roles & Responsibilities in current company. 19} CENDUIT INDIA Services. 36. Architecture used in current project. What do we use to get data without repetition? 6.net. Abstractio? Explain with an example. Adi tech pvt ltd. Tell me about yourself briefly. General 1. Roles & Responsibilities in current company. Salary of February month.1: Technical test. Union (Concept)? 7. Your Roles & Responsibilities in current company. Hr Executive : I for got her name. General 1. Hr Executive : Kiran. What are Delegates? & interfaces? Data Bases No questions asked in data bases. 3. 02. If we want to extract last 5 characters. 5. 2. Do you have idea about HTML? 5. Ado. Hr Executive : Shruti. How can we bypass the code in a stored procedure? 20.net . I take another data set (dst2) with no data in it. What is JQuery? Data Bases No Questions asked in this topic. Team size? Asp. Round-1: General interview. What are the components used to retrieve data (from data bases)? 14.6. will company people agree with it? 9. CSS. Hr Executive : Arpita. Refered by : I net frame consulting. What are all technologies used in current project. How do you find a control in a web page using JAVA SCRIPT? 9. Why Ajax is used? 8. Your current Project? Explain briefly? 3. I have one dataset (dst1) with some data in it. CHIMERA Technologies Services. Previous company? 4. I need to display empty grid view/ How? 7. Where are you currently working? 2. General 1. EMIDS TECHNOLOGIES. Total experience? 6. What is the command in Java Script to display popup window? 10. Compare those two dates & display if those two dates are same or not. Difference between Hash table & temp table? Asp.config files can we have in an application? Data Bases 19. You said notice period as 1 week. Round-1: System test. AJAX. What are content pages? 17. Date1 in (dd/mm/yyyy) format & Date2 in (mm/dd/yyyy) format. Why are you looking for job change? Round-2:Technical interview General 1. How to copy data in dst1 to dst2? 15. Task-1: Count number of vowels in a string. Notice period? 8. How do we find a control in a web page? 8. Can we create user control dynamically in a web page? 6. Java Script.net 4. Programs Accept a string in a text box. Task-2: Count number of dates entered in a string. Previous company projects? Explain briefly? 5. How many web. How many number of content pages can we have in a project? 18. Your role in current company? 2. OOPS. Task-3: Accept two dates. I have grid view in a web page displaying some data according to some criteria. What is CSS? 11.net. Technical Person: Prakash. I have one dataset with 10 tables in it. Different means of implementing CSS? 12. Different kinds of accessing inline classes? 13. How do you manage your code? 5. If I give wrong search criteria. How to delete table at 8th position? 16. Do you know JAVA SCRIPT & AJAX? 7. Display output of bellow tasks in a label. Relevant experience? 7. 3. doc” file for the Round – 1. Why do we use primary key? 27. Hr Executive : Shruti.net? 2. Can you explain normalization concept? 25. What are views? 23. In task given in question 6. What is Asp. Drop down list. Use OOPS Concepts to write class code in above example? 8. Components used to retrieve data from data base to web page? 17. Have you heard about . Round-2:Technical interview. How do you set view state as false for the entire web page? 16.net? 4. Using Inheritance how do you implement above functionality in classes (UML Diagrams)? 9. Asp. What is transaction? .net 1. How do you implement runtime polymorphism? 12. Do you have knowledge of SSRS? EMIDS Technologies Pvt Ltd. Why do we use views? 24. Write code to display data in grid view according to Country & state selected. what do we use to store data to be displayed in grid view? 18. Where dose memory management takes place in Asp. What are joins? 22. What are elementary keys? 28. What is abstraction? 13. How do you preserve data in a page with out using View state (enabling view state as false)? 15. Ado. What is View state? 14. In task given in question 6. What is runtime polymorphism? 11. What is primary key? 26.net Architecture? 5. OOPS. Please refer “interview7. What are HTML Components? 6. Country : State : The above is a sample web page. Technical Person: forgot his name. Do you have knowledge of web services? 24.21.net nuke? 22. How do you display only 10 records in grid view (with out setting no. Architecture of Asp.net component do you prefer when small amount of data is to be retrieved from data base? Data Bases 20. What is polymorphism? 10. of records property of gird view as 10)? 19. Which Ado. What is hash table? 29.net. How do you implement web services into your application? 23. (Code from stored procedures to events) 7. if we need to display only 10 records per page. What tasks did you perform in current company? 3. What tasks have you preformed in (sql server) in the project? 21. Brief about yourself? 2. What are the challenges faced by you in your software career? 8.doc” file for the Round – 1.30. Why do you look for job change? 4. Can you explain what kind of tables have you developed in current project? 7. Can you explain any example (Web page / Module) in your current project? Data Bases 5. How much do you expect? 9. 3. Text area Doctor complaints: Disease : The above is a sample web page (Visit details). What is your current CTC? 8. Are you willing to work in different technologies? 5. Any questions to ask? Round-6: General discussion with Megha. Ok. If I want to add some functionality to the above page. ((a+b)>c). What is your current CTC? 3. Your Aspirations? 6. 1. write generic class to store above expression. Round-4:Technical interview. Brief about yourself? 2. Brief about yourself? 2. Why do we use transactions? Round-3:Technical interview General 1. Congratulations!! you got selected for the position of Software Engineer in this company. Have you created data base tables for web forms using SQL SERVER? 6. What are the challenges faced by you in your career? 3. hr executive. Hr Executive : Megha. Are there any constraints for you to work in this company? 7. Harish. How can you implement the changes & How could you design tables for additional functionality? Round-5:HR Round. Do you have any other offers? 2. Would you like to work in different technology? 4. Order of evaluation of above expression? 4. Please refer “interview7. Have you attended any other interviews (Have you got any other offers)? 6. 1. How much do you expect? 4.doc” file for the Rounds – 2. Technical Person: Anupama. What are the challenges faced by you till now? 5. Please refer “interview9. Any questions to ask? EMIDS Technologies Pvt Ltd. 3. What kind of applications have you developed? 3. General 1. any constraints for you to work in this company? . What is the difference between Abstract Class and an Interface in Java 5. 12) Ant. And company is offering you more than what you have expected.Custom tags. How are constants defined in Abstract Class and in an Interface 7. and how to use it to show how many users are online? Important Jsp Interview Questions 1) Advantage of Jsp over Servlets. 11) Design Patterns.cookies and HttpSession objects? 7) How to send session identifier to client machine if cookie is disabled? Hints response. 9) Tiles Framework. 9) Interfaces implemented to create a filter? 10) What is the difference between doFilter() method of Filter interface and doFilter() method of FilterChain interface? 11) How to use Servlet Listener to create a website counter. 3) Jdbc. 2011 with all the required documents? 1) Servlets. What is Encapsulation 4.Eclipse. Jsp Beans. 8) Modules Framework. When do you use an Abstract Class and when do you use an Interface 6.Listners. 8) What are the use of servlet filters.xml inside your servlet? 3) How can you use ServletContext object to share information among servlets? 4) Difference between using response.encodeURL() method. Log4j. 2) Jsp Life Cycle? 3) Packages & Interfaces used When pagecompiler Servlet converts Jsp into Servlet? 4) What are Implicit Objects in Jsp? 5) What are the elements present in a jsp code apart from template data? 6) What are three types of directives used in jsp? 7) Difference between Scriptlet. Could you join by next Monday. 7) Declarative Exception Handling. 10) Validator Framework. Declarations and Expressions? 8) What are the different Action elements? 9) What is the difference between static include and dynamic include? 10)What are the different comments used in jsp? 11)What are the different scopes in which you can place bean objects? 12)When should we use Java Beans and when should we use custom tags? List of questions asked – 1. 14) Spring.5.hiddenfields. Are you ok with this company to work? 7. 2) Jsp. 15) Google App Engine 16)JavaScript 17)Ajax. Junit. August 08th.Servlet Filters. Explain the architecture of your project at [Company Name] 3.sendRedirect() and requestDispatcher object for forwarding from one servlet to another? Which one should be used and when? 5) What are the different ways to do session management in servlets? 6) How do u implement urlrewriting. 13) Hibernate. Important Servlet Interview Questions 1) Servlet Life Cycle? 2) How can you extract configuration information from web. Please talk about your experience and recent work at [Company Name] 2. 5) MVC Architecture 6) Struts Framework. How are methods defined in an Interface . Jndi 4) Declarative and Programmatic Authenctation & Authorization. When could you join? 6. setParts(). What are different methods available in above the classes? 22. What is the difference between primary key and unique key? 31. What are Servlets? 18. } 8. What are the different bean scopes in Spring? List of questions asked – 1. How good are you with SQL and what version of DB did you use recently? 27.r.equals(b) return ? what does a==b return? 12. what does a == b return ? 11. //getters and setters 7.8. What is JSP? 23. 10. How did you use it? [exaplained w. String engine. 11. What happens if you don’t catch checked exceptions 16. Example – String a = “Hello” String b= ”Hello” what does a. How did you use Dependency Injection in your project? Can you explain in detail? 33. What is a primary key? 29. Explain lifecycle of a Servlet 19. 9. final Car car = new Car().. Is the following possible? Why? 3.. Do you what is JSON? 7. Difference between equals() method and == in Java Can you explain the above with an example? [Interviewer probably not satisfied with the explanation given. What are final. What are checked and unchecked exceptions 15. 5. Can methods in interface be private methods? 9. car. car. Explain lifecycle of JSP 25. String parts.setEngine(). What is an index in RDBMS? 28. What can be done with JSP that can not be done with Servlets and vice-a-versa? 26.t jQuery] 8. Does AJAX support HTTP GET or HTTP POST? 5. Example – int a = 5 . In some other class I want to say . Explain why? . If different complex objects are stored in a list how to find out type of object when it is retrieved from the list? [Answer # using instanceOf keyword] 17. 3. finally and finalize keywords in Java? 2. Do you know what is AJAX? How and when did you use it? 4. 6. When is the Servlet destroy() method called? 20. Have you used both? In which framework? [Answer # the candidate mentioned he used it with jQuery] 6. What is ServletRequest and ServletResponse? 21. How do you declare JSPs? 24. What is a unique key? 30. What are the different types of injections that Spring support? 34. What is type casting in java? Explain with an example 14. When do you overwrite equalsTo() method? 13. Class Car { 4. 9. What is your experience in using Spring Framework? 32. int b = 5 . so framed his own example and asked for explanation] 10. What is the difference between HashSet and TreeSet? 14. What are some of the features of Spring Framework? 54. What is Application Context? 26. AOP. what would be your approach? 32. let us say you have a method that is calling 3 different methods – one that updates database. If you were to design exception handling for a web application or any java application. Explain One-to-One and Many-to-One mapping in Hibernate? 49. What are the different ways of soring a list? 60. Do you know what is Test Driven Development [TDD]? Have you used it? Can you explain the process? 33. Can you have more than one Spring Application Context? 45. Can you tell me at least 2 implementation of Set Interface? 13. Who will perform the JUnit Tests in your team? 18. Do you know what is method injection? 24. In a distributed transaction. roll-back annotation syntax? 55. Agile Methodologies – SCRUM? 43. What is the difference between static synchronized methods and non-static synchronized methods? 11. Difference between SOAP and REST based web services? 42. If the second database operation fails. Does Spring create a single bean instance when you declare a Bean class twice with different Ids? 46. What is Dependency Injection and Inversion of Control? 22. Spring Transactions – annotation syntax. What is the default bean scope in Spring Framework? 44. What are checked and unchecked exceptions? 58. Can you explain the Architecture of your previous project? 36. How to kill a process in linux? 52. List some of the linux/unix commands that you used on a daily basis? 50. Difference between Abstract Class and an Interface? Which gives you performance and why? 34. What are equal() and hashcode() methods in Java? Why do you need them? 31. Difference between ArrayList and LinkedList? 17.10. What is the difference between HashMap and Treemap? 57. How do you debug a SQL query? 35. what Collection would you use? [interviewer was expecting me to answer the purpose of storing etc so I can choose best collection] 12. What are Web Services and why do you need them? 41. Can you mark the interface methods as synchronized? 29. What is ps command? 51. Java 1. how does transaction roll-back works in this case? 56. How can you sort a list with complex objects? . Do you know Big O notations? 16.5 new features? What have you used so far? What is your favorite one? 40. When do you perform JUnit Tests? 19. If you were to store all the license plates from Chicago into a Collection. Is method injection supported by Spring framework? 25. Advantages and disadvantages of Hibernate? 39. Do you know any Test Coverage Tools? 21. Can you explain Prototype bean scope in Spring? 28. Struts vs Spring MVC? 48. What are the different bean scopes in Spring? 27. CPU and Memory utilization in linux? 53. Why do you need ORM frameworks? 37. Can you tell me the Exception class hierarchy (top-down specifically)? 59. What is MVC? 47. Do you know what is JUnit Test Coverage? 20. second that updates file and third that update a database again. Commands to check IO. Difference between Checked and Unchecked Exceptions? 30. What is preemptive scheduling and time slicing? 15. What type of DI does Spring Framework support? 23. What key points would you consider when you were asked to migrate a JDBC based persistence to Hibernate based approach? 38. What you ever configured Spring Batch for multi-threading? 111. 85. 83. 69. 79. Can you explain how to make AJAX calls with jQuery? 98.How familiar are you with Spring MVC Framework? 102.How do you enable lazy loading in Hibernate? 113. 93. Did you use any framework for AJAX? 97.What are Spring Transactions and how did you use them in your project? 105. 70.Have you used any Transactions? 104. 66. 75. 87. 65. What data format have you used to exchange data between client and server while using jQuery? 99. 67. 74. 78. 94. years of experience in each technology. 68. 86. 90.Explain the module that used Spring Batch and how did you use it? 110. skill set. 71. What is lazy loading and when you do used lazy loading in Hibernate? 112. 84. role and day to day activities 96. 76.Can you explain your Web Architecture on how you are using Spring MVC and what are the different layers? 103. 64.If you were to integrate Hibernate into an existing project what are the high-level steps to do so? 107.What are the different ways to resolve LazyInitializationException in Hibernate? . 73. 72. 80. 89. can you work only on front-end? Difference between REST and SOAP based Web Services? Have you used Spring? What modules did you use in Spring? How did you use JSON in Java? What JSON API did you use? Do you know what is TypeMash? Do you know what is Tiles Framework? What design patterns have you used? Can you explain any one in detail? How can you sort a list? Have you used a Java Comparator ? What is an Abstract Class? What is an Interface? When do you use an Abstract Class and When do you use an Interface? Can you create instances of an Abstract Class? What is the difference between StringBuffer and StringBuilder? What is Strategy Pattern? What is a Builder Pattern? What is the difference between function overloading and overriding? Can you please explain little bit about your technical background.What is your experience with Front-end Frameworks? 101.Have you ever encountered LazyInitializationException ? 114. 82. 95. your current project. 62. 88.When and Where did you used Spring Batch and Spring Integration Frameworks? 109. 77. 92. Explain a real-time scenario where you have used AJAX? 100.61. 81.What is your experience with Hibernate ? 106.What other modules of Spring have you worked? 108. Have you used Hibernate? What are the difference object states in Hibernate? What is Hibernate N + 1 problem? Any experience with Web Services? Have you used REST based Web Services? Difference between XHTML and HTML? Do you know CSS? Do you know Javascript? What Javascript frameworks have you used? Have you used JSON? Where exactly did you use JSON? Do you know AJAX? Have you used jQuery with AJAX? How did you use JSON and where? What kind of work have you done in the front-end? Are you a front-end developer or a back-end developer? Given a chance. 63. 91. Have you used AOP? 127. What are Joins in SQL? 7. Can you explain Left Outer Join in SQL? 8.What motivates you to work? 125.What are some of the Design Patterns you have used recently? 129.What is your experience with SQL? 118.On Java side. Can you explain the structure of a SOAP Message? 13. Lets assume you are trying to connect to database using Hibernate.Have you ever used Messaging in your application? 121. can you briefly explain the steps? 9.What is your experience with Application Servers? 116. Over all interviewer focused on the following topics – Core Java Web Services .How are Exceptions handled in your application? 126.What your used any ESB [Enterprise Service Bus]? 130. SQL.Can you talk about Custom Column Mappers in Spring Batch 120. What other Design Patterns have you used in Java? 5. What is a Factory Design Pattern? 4. What is PortType in WSDL? 12.115. What is the process to persist data in Java? 6.Can you talk more about Spring Batch from a configuration perspective? 119.How did you integrate Jackson with Spring MVC? Over all interviewer focused on the following topics – Spring Framework Spring MVC Spring Batch JMS Explain about your current project? What technologies they have used and why is your role in the project? Explain architecture of your project. finally and finalize keywords in Java? 3. did you used any API for JSON conversion? 131. Can you briefly explain your current project and your technical skills and your role in the project? 2. struts.Do you have experience working with an off-shore team? 124. What are final.Can you explain a module where you have used Messaging in your application? 122. What is WSDL? 11. How many years of experience do you have in hibernate. What are different aggregation types in UML? 14.Do you know how to configure a DataSource in WebSphere or JBoss Application Server? 117.Have you used Web Services? 128. web services? How did you use web services in your project? Do you know how to create and consume web services? How do your rate yourself with SQL? Can you write really complex queries? Have you done any SQL performance tuning? What methods have to used? What is the difference between hibernate load and get ? What are proxies in hibernate ? Is your web application deployed in single JVM? How are transactions handled within your web application? Any experience writing custom tag libraries? Any experience with workflow model or BPM? How do you generate hibernate mapping files? Have you ever used any tools to generate mapping files? 1. What are different types of injections in Spring? 10. What is SQL injection? And some general discussion on the projects and technologies.Are you more a front-end person or a back-end person? 123. 11. how? What is a Marker Interface? Give an example. 23. Tavant Technologies Round 1:F2F . Have you used AOP in your current project? 10. Can you explain Bean life cycle in Spring Bean Factory Container? 12. 17. What is the difference between JRE. Default. What is the difference between Method Overloading and Method Overriding? What is the difference between Runtime Exception and Compile Time Exception? What is a checked exception? What is an un-cheked exception? Do Java support Multiple Inheritance? If yes. why do we need such constructors? What is a wrapper class? What is an immutable object? Can we declare a variable inside an interface? If yes. 15. Can you briefly explain your technical skill set and your experience with different Java Frameworks. What is AOP ? 9. What is the difference between regular JDBC exceptions and Spring JDBCTemplate exceptions? Most of the questions were focused on Spring and Hibernate Framework because Interviewer clearly mentioned that they are looking for a candidate who can help them with project that is going to be primarily built on Spring and Hibernate Frameworks. Can you explain your current project and the technology stack used ? 3. especially with Spring and Hibernate ? 2. On what design patterns is Spring Framework built? Can you briefly explain them? 4. 25. What are the features of Spring Framework? 8. 18.. 6. then what should be the variable’s modifiers? What is an Abstract Class? What is coupling and cohesion? What is type-casting? What is the default value of a ‘char’ variable? What is the difference between ‘Bitwise AND’ and ‘Logical AND’ operator? How do you iterate through a HashMap? What are the advantages of using ArrayList<String> over String Array (String[]) ? What is Generics? What is Reflection? What is Auto-Boxing? How are Javadoc comments different from normal comments? What is a Object Factory Method? What is Var Args? Is it possible to write a try block without catch? Tavant Interview Questions. What is auto-wiring? 13. 27. 4. 24. 19. What is the difference between Bean Factory and Application Context? 11. 10. What are the steps to integrate Spring with Hibernate? 18. 12. Private? Can a class constructor be private? If yes.. What are different benefits of Spring Framework? 6. Have you worked on any other Spring Modules other then Spring Core? 7. Protected. 26.SQL Hibernate UML This was a telephonic interview and the candidate was asked the following questions – 1. 16. 20. 2. What are different types of auto wiring in Spring? 14. JDK and JVM? Explain the visibility of 4 types of access modifiers – Public. 13. 22. What is JDBCTemplate in Spring? 17. 7. What are different Bean scopes in Spring? 15.. 14. What are differences between J2EE and Spring Framework? [Interviewer actually intended to ask differences between EJB Container and Spring Container] 16. 21. 3. What are benefits of IoC? 5. 5. 1. 9. 8.. When do you use it? What are the disadvantages of synchronization? 10. Difference B/w primary key and unique key 10. Tell about your self ? 2. What is the ActionForm in struts? . a physical balance is given. Write the hierarchy of Collection framework? 3. What does the keyword "synchronize" mean in java.HR+ Managerial round 1. By this u have to give me 3l of water? Is it possible? If yes tell me how ii) 8 balls. to make 3 equal pieces Round 3. Framework 6. Discuss the advantages and disadvantages of both? 9. 11) SQL queriesa) how to find duplicate records in a table b) Display the name of the emp who is getting 10th maximum salary 12) Logical questions: i) A 2l bottle and a 4l bottle. Can unique key column hold null values? If yes how many null values? 11. 5) What are the collections u used in ur project? 6) Framework explanation 7) How to find no of rows or columns in a table? 8) Diff b/w interface and abstract class? 9) Various oops concepts used in the project? 10) Roles and responsibilities. using this how to find the defective one.1) Tell abt ur technical skills 2) How to work with ajax applications? 4) Asked about page factory design concepts. Experienced Java Interview questions asked by CGI Company Name : Wipro Sent By : Sai Pavan Interview Questions: 1. When array will be used ? and when array list will be used? 28. From that he asked that do u perform auto it scripts in parallel execution? 9. Logical questions a) Cake in round shape.eid. Tell abt ur self 2. He is asking the same questions in different ways for 15 min 5. What is the difference between a Vector and an Array. Collections u used in the project 13.age a) Find the name of the emp who has 3rd max age b) Having clause and where clause 3. order of execution 12. asked me to tore the paper once. having same color and weight. What is a String in Java? 5. SQL queriesemp table fieldsename. can the abstract class implement the methods of interface? 8. Scenario-an abstract class implements an interface. 7. What are the difficulties u faced in ur previous job? 4. how to make it as 120 c) He gave me a paper. What’s the difference between == and equals method? 8. 4. and u have to divide into 8 equal pieces b) Using 5 zeros. Round 2 1. What is Iterator? 6. What is JDBC? Describe the steps needed to execute a SQL query using JDBC? 11. Why u r looking for the job? 3. Explain about the Struts frameworks. out of that 1 is defective. Difference b/w abstract class and interface. Use of super keyword. List some methods in the ArrayList class? 7. What is run-time polymorphism? Explain with program? Where is it achieved? 2. u have to cut the cake by 3 times only. What is the default transaction attribute for an EJB? 14.hibernate whats the use of having keyword . what is bean managed transaction in ejb? 5. What are jsp core librabries? 14. Write a sample program using iterate through a hashmap and print values? 3. How you will display validation fail errors on jsp page? Company Name : HCL Technologies Limited Sent By : Manideep Interview Questions: 1. is there any chance for deadlock in java spring simpleform controlller and method whats webservice? what are jsp core librabries? various level of synchronization?how to call stroed procedure from hibernate Prasanna. what is the use of having keyword in sql? 7. spring simpleform controlller and method? 12. Difference between the stored procedure and functions ? 8. Is there any chance for deadlock in java ? 11. All the best !!!!!!! Company Name : ADP Sent By : Vamshi Krishna Interview Questions:  how can execute the prepared statement is executed in more than one in application? Where the ps object is created either db or application?  What is Cloneable Interface?  How to decide whether to use Interface or Abstract Class?  What are the types of Executor Interfaces ?  What are the core interfaces in Hibernate? . How to call stored procedure from hibernate? Company Name : TCS Sent By : Prasanna Interview Questions:               Thanks whats inline thread? iterate thro a hasmap and print values How to sort arraylist? whats bean managed transaction .sql oracle stored procedure and functions various types of struts actions whos responsible for serilization . what is named query in hibernate ? 6. What is inline thread ? 2. what is webservice? 13.12. How to sort arraylist? 4. Explain various level of synchronization? 15. who is responsible for serilization ? 10. What design patterns are used in Struts? 13.ejb whats named query . What is the difference between session and entity beans? When should I use one or the other? 15. Explain various types of struts actions? 9. What is use of finally keyword in exception handling? 7. how can you retrieve Hashtable elements in the same order as they are put inside? 10. If two Interfaces have same Method.x++) { if(x<10) { system.println("value is: " + (i+x)). What's the difference between forward & include tags? What URL (absolute or relative) is used in RequestDispatcher forward? 6. Is it possible to write methods in JSP ? If so.xml and validation-rules. Tell about your self ? 2. how to handle that Method in a Class implementing these two Interfaces?  Which type of EJB can use bean pooling?  Difference between Include Directive & Include Tag?  what use of Ajax?  What parsers are supported in Ajax?  what situation validation framework is applied in struts framework?  what is difference between the validation. can there be a constructor in Servlet class or not ? Why ? 5. So. ejbCreate() Vs ejbPostCreate() 12. What is the difference between a constructor and a method? 3. Explain polymorphism. Can a table have two primary keys? . } } 9. All the best !!!!!!! Company Name : Syntel Sent By : Mallikarjun Interview Questions: 1. ejbActivate() Vs ejbPassivate() 11. what will be the output of the following program? int i. Oracle Thin Driver comes under which type of Driver ? Thanks Mallikarjun. Difference between Hashtable & HashMap ? 9. Then. Which type of EJB can use bean pooling ? 14.x<14.out. How do you declare a page as Error Page.xml?  whats difference between the HTML and Dhtml? Thanks Vamshi Krishna. What tag you include in a JSP page so that it goes to specified error page in case of an exception ? 3. How can you call an EJB from a JSP/Servlet ? 15. All the best !!!!!!! Company Name : TCS Sent By : Rithika Interview Questions: 1. Why native methods are used ? 2. Explain different way of using thread? 5. How to configure Data Source in WebSphere server ? 16. ejbLoad() Vs ejbStore() 13. how ? 7. 6. Servlet is a java class. Difference between Include Directive & Include Tag ? 4. What is the purpose of garbage collection in Java. and when is it used? 8. Difference between JSP & Servlets ? 8. By default. Provide an example. What is the difference between an Interface and an Abstract class? 4. for(x=0. Hashtable is unordered. How do you manage transactions in EJB ? Thanks Varun. How to make a class or a bean serializable? 12. What is the difference between Callable Statement and Prepared Statement? 10.10. Tell me about yourself? 2. Why do you want to leave the present company ? 3. Can we declare final method in abstract class ? 11. What is SingleThreadModel? 16. All the best !!!!!!! Company Name : CSC Sent By : Murali Raj Interview Questions: 1. How can we know that a session ha already existed or not ? Thanks Murali . Can I have an Action without a form? 13. What is the difference between Inner Join and Outer Join ? 13. Can the same object of Stateless Session bean be shared by multiple clients ? 17. What is the Difference between DispatchAction and LookupDispatchAction? Thanks Rithika.JSP or SERVLET ? Why ? 9. When these methods are used ? ejbActivate(). What are run time exceptions? 9. Explain abount Static Methods ? 3. Do you know about Sequence Diagrams in UML ? 8. ejbPassivate() and ejbRemove() ? 15. What is the difference between ServletContext and ServletConfig parameter? 17. What do you know about our (Manhattan Associates) company ? 4. Session. BMP. If two Interfaces have same Method. What is the serialization? 11. What is the difference between GET and POST? 15. Explain Servlet Life cycle ? 14. Can we declare abstract method in final class ? 12. Tell about yourself 2. All the best !!!!!!! Company Name : Keane India (NTT DATA) Sent By : Ashish Interview Questions: 1. What do you mean by immutable? 4. Can a Client Context call ejbRemove() method ? 6. What is the difference between String and StringBuffer? 3. Why is thread methods like notify and notifyAll is defined at Object level? 8. Which is faster in execution . Entity beans. Who calls the methods ejbLoad() and ejbStore() and where the state information is stored when they are called ? 7. CMP. how to handle that Method in a Class implementing these two Interfaces? 13. how to create table with in the procedure or function? 11. What is the role of Action Class? 12. What is the difference between ejbPassivate() and ejbRemove() ? 16. Can you list few methods that are available at Object class level? 7. All the best !!!!!!! Company Name : Manhattan Associates Sent By : Varun Interview Questions: 1. How do you compare objects of String and StringBuffer? 6. How can you pass an object of data from one JSP to another JSP ? 14. What is Marker interface? 10. when to use what type of beans ? 5. their differences. Can you explain the same with an example? 5. Can the same object of Stateful Session bean be shared by multiple clients ? 18. About EJB types. In How many ways can u create an object for a class? 2. What is abstraction? . Difference between Jsp and servlets? 18. Can we create constructor for abstract class? 10. Difference between immutable and final. What is the purpose of garbage collection in Java. protected. What frameworks would you use to develop your dream application? 7. project architecture in interviews? 8. All the best !!!!!!! Company Name : L&T Infotech Sent By : Geetha Interview Questions: 1. Map and List. Can we create constructor for abstract class? 9. What is Life Cycle of Servlet? 7. What is the second level cache in Hibernate ? 11. How hibernate implements lazy loading ? 10. What are pass by reference and passby value? 7. All the best !!!!!!! . How do you create a thread dump? 3. Difference between Vector and ArrayList? 10. When to implement what? 14. What are the main new features of Java5 ? Same question with Java6 ? 12. How to synchronize ArrayList 12. Difference between Swing and Awt? 11. Difference between HashMap and HashTable? 9. What's new and/or up and coming in the industry? 5. what is port no of oracle 11. What is final? Thanks Geetha. Difference between JspWriter and PrintWriter? 19. How does garbage collection work? 2. What is the difference between a constructor and a method? 12. All the best !!!!!!! Company Name : Mindtree Sent By : Prathap Interview Questions: 1. What is the difference between an Interface and an Abstract class? 3. What is an Iterator? 13. How to make a collection or map immutable without using any existing features? 6. What are the main benefits of using Spring on a project ? 8. Why do we need struts? 13. Describe synchronization in respect to multithreading. State the significance of public. and when is it used? 4. private. What is AOP ? 9. How do you profile an application? 4. What is static in java? 16. What is an abstract class? 15. Difference between ApplicationServer and webserver? 15. Tell me about your self? 2. 5. Difference between error and exception 6. Importance of hashcode and equals. how to import a package without using import key word? Thanks Ashish. What is HashMap and Map? 8. Explain different way of using thread? 6.4. What is the diff between synchronized and volatile?please write with example 16. is array list is synchronized 17. How will you decide whether to use Interface or abstract ? 14. 13. Difference between Set. Thanks Prathap. What is Encapsulation? 5. default modifiers both singly and in combination and state the effect of package relationships on declared items qualified by these modifiers? 14. Difference between merge() and Update() methods? 11. How do you declare a page as Error Page. How to connect more than one database in hibernate? 4. What’s the difference between forward and include tags? What URL (absolute or relative) is used in RequestDispatcher forward? 15. is it possible without hibernate mapping file doing hibernate application? 15. How many ways possible Multi Threading? which ways is better? 6. Difference between page and pagecontext in jsp ? 12. Difference between sting and string buffer class ? 13. Oracle Thin Driver comes under which type of Driver ? 6. What is the use of singleton class ? 5. Tell me about your self? 2. How can you increase connection pool-size in web logic? 18. How to write form bean tags in your struts-configuration file? 7. Is it possible to write methods in JSP ? If so. I have 4 action classes i want get second action class how can i get it? where are you configure? can u write code ? 8. how ? . how to include one jsp into anther jsp? which tag we are use write it? 3. Write a actual singleton java class? 5. How can you achieve encapsulation your project? 11. In what cases you will use Abstract Class and Interfaces? 7. i want change my database instead of oracle using MySQL in hibernate where we configure?which class u r use? 5. Difference between Include Directive and Include Tag ? 9.Company Name : CapGemini Sent By : Priya Company Name : Siemens Sent By : Sunitha Interview Questions: 1. what are the problems you get doing hibernate projects? 12. What is the importance of SessionFactory in Hibernate? 10. What is the difference between doPost and doGet methods? 14. All the best !!!!!!! Company Name : MindTree Sent By : Abhinav Interview Questions: 1. What tag you include in a JSP page so that it goes to specified error page in case of an exception ? 8. class states in hibernate? 17. is it possible without hibernate configuration file doing hibernate application? 16. how can you connect more than one database in your hibernate application? 13. difference between dialect and driver? 14. How integrate your project in spring with hibernate? Thanks Sunitha. Difference between Hashtable & HashMap ? 6. All the best !!!!!!! Company Name : HCentive Technology India Pvt Ltd Sent By : Rishika Interview Questions: 1. Tell me about single thread model in servlets? 9. What is Difference between iterator and list iterator? Thanks Abhinav. How do you configure using spring mvc with Dao class? 2. What is stack and heap memory in java? 3. Tell me about your self? 2. What is runtime exceptions? Give some examples? 4. What is static in java? 4. Explain your current project ? 3. WHAT is serialization? how can you achieve it?where are implement in your project? 10. How to call remote method by RMI using Spring 9.sql. Difference between method overloading and overriding ? 9. How can you call an EJB from a JSP/Servlet ? 17. How do you handle SQLException in Spring? 6. Which version of Spring have you used recently and what is difference you observed from previous spring version? . We have equals() to compare two methods then why comparator again ? 15. How to get the sessionfactory obj in hibernate ? 11. Difference between java. What is comparator ? 14. How to you setup JDBC connection pool in Spring etc? 7. How to configure Spring using Annotation? 13. Does Singleton from Spring Container is thread safe? 3.7. What is Difference between interface and abstract class ? 10. How do you make a Singleton bean to lazy load in ApplicationContext which loads all Singleton beans eagerly during startup? 11. What is Spring IOC Container ? 2. Who is loading the init() method of servlet? Thanks Rishika. All the best !!!!!!! Important Spring Interview Questions Spring FAQ's 1. Why Spring MVC is better than Struts? 4. What is the difference between exception and error? 12. Can u write final method in abstract class ? 8.util. What is benefit of using JdbcTemplate? Why should you use JdbcTemplate in Spring? 5. Which type of EJB can use bean pooling ? 16.date and java. What scheduling feature Spring framework provides? 10. Does Spring Security part of Spring framework? 12.date ? 13. What is Spring Integration? 8.