Core Java Interview Question

1. Core Java Interview Questions and answers
   We are constantly trying to provide best Core Java Interview questions.
    
2. Core Java Interview Question Page 1
   How could Java classes direct program messages to the system console, but error messages, say to a file?
       
3. Core Java Interview Question Page 2
   Does it matter in what order catch statements for FileNotFoundException and IOExceptipon are written?
    
4. Core Java Interview Question Page 3
   When you declare a method as abstract method ?
    
5. Core Java Interview Question Page 4
   What is the difference between checked and Unchecked Exceptions in Java ?
    
6. Core Java Interview Question Page 5
   What are different types of inner classes ?
     
7. Core Java Interview Question Page 6
   How can i tell what state a thread is in ? 
     
8. Core Java Interview Question Page 7
   What is serialization ?
     
9. Core Java Interview Question Page 8
   What are the static fields & static Methods ? 
    
10. Core Java Interview Question Page 9
    What are the uses of Serialization? 
      
11. Core Java Interview Question Page 10
    What is the difference between notify and notify All methods ? 
     
12. Core Java Interview Question Page 11
    What is serialization ? 
      
13. Core Java Interview Question Page 12
    What is a transient variable?
     
14. Core Java Interview Question Page 13
    What is an Iterator interface?
     
15. Core Java Interview Question Page 14
    What is clipping?
     
16. Core Java Interview Question Page 15
    What invokes a thread's run() method?
      
17. Core Java Interview Question Page 16
    Which containers may have a MenuBar?
     
18. Core Java Interview Question Page 17
    What is the difference between a Window and a Frame?
      
19. Core Java Interview Question Page 18
    Is &&= a valid Java operator?
      
20. Core Java Interview Question Page 19
    What is the difference between static and non-static variables?
      
21. Core Java Interview Question Page 20
    Name four Container classes.
      
22. Core Java Interview Question Page 21
    How are the elements of a GridLayout organized?
      
23. Core Java Interview Question Page 22
    What is a compilation unit?
     
24. Core Java Interview Question Page 23
    To what value is a variable of the boolean type automatically initialized?
     
25. Core Java Interview Question Page 24
    Why do we need public static void main(String args[]) method in Java?
      
26. Core Java Interview Question Page 25
    What are null or Marker interfaces in Java?
      
27. Core Java Interview Question Page 26
    How many number of non-public class definitions can a source file have A source file can contain unlimited number of non-public class definitions List primitive data types, there size and there range (min, max).
      
28. Core Java Interview Question Page 27
    What are access modifiers?
      
29. Core Java Interview Question Page 28
    What are wrapped classes?
      
30. Core Java Interview Question Page 29
    What is the difference between while and do while loop?
      
31. Core Java Interview Question Page 30
    What's the difference between constructors and other methods?
      
32. Core Java Interview Question Page 31
    Where does java thread support reside?
     
33. Core Java Interview Question Page 32
    What is the ultimate ancestor of all java classes?