some common interview questions on Java

 Here are some common interview questions on Java:

1. What is Java and why is it popular?

2. What is the difference between JDK, JRE, and JVM?

3. What are the basic concepts of object-oriented programming (OOP)?

4. What is the difference between an interface and an abstract class?

5. What is the difference between a class and an object?

6. How do you handle exceptions in Java?

7. What are the access modifiers in Java and what do they do?

8. What is the difference between a static and a non-static method?

9. What is the difference between the equals() method and the == operator?

10. What is the difference between ArrayList and LinkedList?

11. How do you implement multithreading in Java?

12. What is the purpose of the final keyword in Java?

13. How do you implement inheritance in Java?

14. What is the difference between a checked and an unchecked exception?

15. What is a Java Virtual Machine (JVM) and how does it work?

It's important to note that interview questions can vary depending on the job position and level of experience required. Make sure to prepare by studying the job description and the company's technology stack. Also, be ready to demonstrate your coding skills and problem-solving abilities through coding exercises or whiteboard sessions.