Interview questions

JAVA interview questions – page 45

2,804 questions. Tap “Show answer” to check yourself.

  1. What does it mean that a method or field is ?static?

  2. What would happen if you say this = null

  3. What are the differences between EJB 3.0 and EJB 2.0 ?

  4. What is IDEN?

  5. How we know a class is Serialized or not from a package

  6. What is property editor in java beans?

  7. In overriding, in super class we declared a method as protected & in sub class we declared that method as private. what happens?

  8. Have you used threads in Servlet?

  9. What is the middleware. What is the functionality of Webserver?

  10. JavaBeans has mechanisms like "bound properties" for data transfer between components. Why is the InfoBus necessary?

  11. Why java uses singly rooted heirarchy?

  12. What are the purpose of introspection?

  14. What is Action Class? What are the methods in Action class?

  15. What is bean customization?

  16. What are the differences between ArrayList and a Vector

  17. What are Java Beans?

  18. Explain Java security model

  19. How to Make Updates to Updatable Result Sets?

  20. Constructors can not be inherited,why?

  21. What is the Difference between Design Pattern and Architecture?

  22. What is the difference throw and throws

  23. What is Glasgow?

  24. Write a program that singleton objects returns two instances?

  25. What is the difference between the Reader/Writer class hierarchy and the InputStream/OutputStream class

  27. Name three Component subclasses that support painting?

  28. Canweimplement aninterface in JSP Page? If yesHow?write thecode?

  29. How are Observer and Observable used?

  30. What is the difference between Stream Reader and Stream Writer?

  31. What is HLR?

  32. What is clipping?

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