Interview Questions

1. Mutable and Immutable objects.

2. Tell about Oracle Architecture.

3. How will the select query will be executed internally and process of execution.

4. In which form the data will be stored in the Database.

5. What are Singleton objects give some examples.

6. Difference between String class and StringBuffer class.

7. Difference between truncate and delete.

8. Difference between HashTable and HashMap.

9. What is Schema?

10. What is the use of commit?

11. Difference between Servlets and JavaBeans.

12. What are Kernel Variables?

13. What is Deadlock?

14. Data Encapsulation.

15. Difference between Primary Key and Foreign key.

16. Difference between class and structures.

17. Disadvantages of Java/Oops.

18. Difference between ArrayList and Vector.

19. Can we declare static methods, blocks and variables in super class as well as subclass.

20. What is an Applet and Applet Lifecycle method?

21. Difference between Applet and Servlets.

22. Servlet Lifecycle methods.

23. How to package backup in Database.

24. Is there any method mustInherited() in java.

25. What are struts and its use?

26. Difference between Servlets and struts?

27. What is the difference between method overloading and method overriding.

28. What is an event and event delegation model.

Java Interview Questions (02/06/2011)

41. Is there any tool in java that can create reports ?

42. What is meant by Java ?

43. What is meant by a class ?

44. What is meant by a method ?

45. What are the OOPS concepts in Java ?

46. What is meant by encapsulation ? Explain with an example

47. What is meant by inheritance ? Explain with an example

48. What is meant by polymorphism ? Explain with an example

49. Is multiple inheritance allowed in Java ? Why ?

50. What is meant by Java interpreter ?

51. What is meant by JVM ?

52. What is a compilation unit ?

53. What is meant by identifiers ?

54. What are the different types of modifiers ?

55. What are the access modifiers in Java ?

56. What are the primitive data types in Java ?

57. What is meant by a wrapper class ?

58. What is meant by static variable and static method ?

59. What is meant by Garbage collection ?

60. What is meant by abstract class

Today's Interview Questions....

21. What are the methods in Applet ?

22. When is init(),start() called ?

23. When you navigate from one applet to another what are the methods called?

24. What is the difference between Trusted and Untrusted Applet ?

25. What is Exception ?

26. What are the ways you can handle exception ?

27. When is try,catch block used ?

28. What is finally method in Exceptions ?

29. What are the types of access modifiers ?

30. What is protected and friendly ?

31. What are the other modifiers ?

32. Is synchronised modifier ?

33. What is meant by polymorphism ?

34. What is inheritance ?

35. What is method Overloading ? What is this in OOPS ?

36. What is method Overriding ? What is it in OOPS ?

37. Does java support multi dimensional arrays ?

38. Is multiple inheritance used in Java ?

39. How do you send a message to the browser in JavaScript ?

40. Does javascript support multidimensional arrays ?