Java interview questions (Nepal)

At 2014, I completed my Bachelors in Computer Engineering. I had applied to number of software development companies in Nepal. Some of them are:

1. Deerwalk Inc.
2. Himalayan IT
3. F1 soft
4. Leapfrog Technologies
5. E & T Nepal

There were different types of exams and tests. Interviews, written test, simple programming tasks, IQ tests, etc were pretty common in all the companies. As I had applied for Java developer's post, I faced various questions which I have compiled here for your references. It is really helpful to be able to answer these questions and go for any interview calls.

Please let me know if there is any concern.

1. Difference between Class and Object
2. Difference between Abstract class and interfaces
3. What is singleton class?
4. What is reflection in java?
5. Difference between OOP in java and OOP in C ++
6. Do you define a function in interfaces?
7. Can you name 15 keywords of java?
8. What is top-down approach? What is bottom-up approach?
9. What is "static" in java? (answer based on static variable, static method, static class, static code block)
10. What is the use of super in Java?
11. How can you use "final" in java? (answer based on final variable, final method, final class)
12. Different types of access specifiers. (public, protected, private, default)
13. What happens if you make constructor private?
14. Can you name any design patterns?
15. What is thread?
16. How can you make threads in Java?
17. What is the use of synchronized keyword?

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