Wipro Java Interview Questions | 2013

Wipro Java Interview Questions | 2013 :

* Explain OOPs concepts in java?

* In what cases you will use Abstract Class and Interfaces?

* What is stack and heap memory in java?

* What is runtime exceptions? Give some examples?

* Write a actual singleton java class?

* Write a program to print the given array in reverse order {2,5,3,1,4} ?

* What is the difference between sleep() and wait() methods?

* What is the difference between Thread class and Runnable interface in Java?

* Explain Servelet life cycle ?

* Difference between forward() and sendRedirect() ?

* How JSP handle runtime Exceptions?

* Why hibernate?, Why not JDBC?

* What is the importance of SessionFactory in Hibernate?

* Difference between merge() and Update() methods?

* What is Secondary level cache in hibernate?

* How do you declare a page as Error Page. What tag you include in a JSP page 

* so that it goes to specified error page in case of an exception ?

* Difference between Include Directive & Include Tag ?

* Why native methods are used ?

* Servlet is a java class. So, can there be a constructor in Servlet class or not ?

* What’s the difference between forward & include tags? 

* What URL (absolute or relative) is used in RequestDispatcher forward?

* How to configure Data Source in WebSphere server ?

* Oracle Thin Driver comes under which type of Driver ?

* Is it possible to write methods in JSP ? If so, how ?

* Difference between JSP & Servlets ?

* Which type of EJB can use bean pooling ?

* How can you call an EJB from a JSP/Servlet ?

* Difference between Hashtable & HashMap ?

* By default, Hashtable is unordered. Then, how can you retrieve Hashtable 

* elements in the same order as they are put inside?






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