Top 20 Java Interview Questions For Freshers

Java Interview preparation covering core concepts, OOPs, collections, multithreading, exception handling, and real-time scenarios for freshers and experienced candidates.

1. What is Java?
2. Why is Java platform independent?
3. What is JVM?
4. Difference between JDK, JRE, and JVM?
5. What are the OOP principles in Java?
6. What is encapsulation?
7. What is inheritance?
8. What is polymorphism?
9. What is abstraction?
10. Difference between abstract class and interface?
11. What is String immutability in Java?
12. Difference between == and .equals()?
13. What is a constructor?
14. What is the this keyword?
15. What is the final keyword?
16. What is an exception?
17. Difference between checked and unchecked exceptions?
18. What is multithreading?
19. Difference between Array and ArrayList?
20. What is garbage collection in Java?