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Here are the top 20 most asked Java interview questions
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1. What is the difference between local and instance variables in Java?
2. What is constructor overloading in Java?
3. What is context switching in Java?
4. What is the use of try-catch block in Java?
5. What is the difference between method overloading and method overriding?
6. What is an exception?
7. What is the difference between ArrayList and LinkedList?
8. What is the difference between checked and unchecked exceptions?
9. What is the difference between static methods, static variables, and static classes in Java?
10. What is the difference between throw and throws?
11. What are the Object Oriented Features supported by Java?
12. What is the difference between final, finally, and finalize?
13. What is the difference between stack and heap memory?
14. What is the difference between a HashSet and a TreeSet?
15. What is garbage collection?
16. What is the difference between a HashMap and a TreeMap?
17. What are the different access specifiers used in Java?
18. What is the difference between an abstract class and an interface?
19. What is a thread and what are the different stages in its lifecycle?(Multithreading)
20. What are the differences between constructor and method of a class in Java?