J2EE Interview Questions

21. What are the major differences between servlet 2.2 and servlet 2.3 ?

22. What are the major differences between JSP 1.1 and JSP 1.2 ?

23. What is JSTL and how is it useful int he UI development ?

24. How would you know if a session is closed in the application ?

25. What are the various listener classes available in servlet API?

26. What are the various listener classes available in JSP API ?

27. Explain the packaging structure in a war file which includes custom tags and Javabeans with servlets and JSPs ?

28. Give a class level design and explain where would you use JSP, servlets, JavaBeans, and Custom tags taking a realtime example{say a login application]?

29. What is a front controller pattern ?

30. how do you precompile a JSP page?

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