Java Interview Questions

Java Interview Question

Hello friends here i will give you some Java Interview Questions which is generally asked in any interview.

1. What do you know about Java?
2. List any five features of Java?
3. Why is Java Architectural Neutral?
4. How Java enabled High Performance?
5. Why Java is considered dynamic?
6. List two Java IDE’s?
7. What do you mean by Object?
8. Define class?
9. What kind of variables a class can consist of?
10. What is a Local Variable?
11. What is a Instance Variable?
12. What is platform?
13. What is a Instance Variable?
14. What is a Class Variable?
15. What is the main difference between Java platform and other platforms?
16. What is Singleton class?
17. What do you mean by Constructor?
18. List the three steps for creating an Object for a class?
19. What gives Java its 'write once and run anywhere' nature?
20. What is the default value of byte datatype in Java?
21. What is the default value of float and double datatype in Java?
22. When a byte datatype is used?
23. What is classloader?
24. What is a static variable?
25. What do you mean by Access Modifier?
26. Is delete,next,main,exit or null keyword in java?
27. What is protected access modifier?
28. What do you mean by synchronized Non Access Modifier?
29. What is the default value of the local variables?
30. According to Java Operator precedence, which operator is considered to be with highest precedence?
31. Variables used in a switch statement can be used with which datatypes?
32. When parseInt() method can be used?
33. Why is String class considered immutable?
34. Why is StringBuffer called mutable?
35. What is constructor?
36. What is the difference between StringBuffer and StringBuilder class?
37. Which package is used for pattern matching with regular expressions?
38. java.util.regex consists of which classes?
39. What is the purpose of default constructor?
40. What is finalize() method?
41. What is an Exception?
42. What do you mean by Checked Exceptions?
43. Explain Runtime Exceptions?
44. Does constructor return any value?
45. Which are the two subclasses under Exception class?
46. When throws keyword is used?