[مخالف - طلب حل : ]مجموعة اسئله

1. What is JVM ?

2. What is JDK(SDK)?

3. What is the difference between call by value and call by reference? When each one of them is used in Java ?Give an example .

4. What is “Exception”?

5. What is Null Pointer Exception?

6. What is the constructor? Default constructor? And overloaded constructor?

7. When do we use “Static” methods and variables?

8. When do we use final methods?

9. What is the deference between defaults , private , protected & public access modifies?

10. What difference between overriding & overloading ?

11. What is Encapsulation?

12. What is polymorphism?

13. What is “Abstract Class”?

14. What is “Interface”?

15. What is the difference between abstract class and interface?

16. When do we use the word “extends” and the word “implements” ?

17. Can we use the “extends” & “implements” more the once in a class ?

18. What is “package”?

19. What is the “Collection” API?

25. What is JSF?

26. What is ADF?

27. What is “session”?

28. What s “request” & “response”?

29. What is the difference between session variables & request variables ?

30. What is JavaScript & why do we need it?

31. What is AJAX?

32. What is CSS?

33. What is Portal?

34. What is Java Heap and Garbage collection ?

35. Why you choose to be a Java Developer?

36. What is the difference between Web Container and Web Server?

38. How will you handle the exception in JSP without sending to error page ?

42. What is the difference between jsp and servlet life cycles?

43. What is the difference between _jspInit() and jspInit ()?

44. Can we use main method inside JSP? Why?

45. How do you prevent the Creation of a Session in JSP Page and Servlets?