Here are some of the Java questions which are often asked to new joiners in our project interview. You will get a basic idea of Java project interviews in TCS. I’ll publish the answers in future, may be as a separate blog post.

1. What is the difference between Method Overloading and Method Overriding?
2. What is the difference between Runtime Exception and Compile Time Exception?
3. What is a checked exception? What is an un-cheked exception?
4. Do Java support Multiple Inheritance? If yes, how?
5. What is a Marker Interface? Give an example.
6. What is the difference between JRE, JDK and JVM?
7. Explain the visibility of 4 types of access modifiers – Public, Protected, Default, Private?
8. Can a class constructor be private? If yes, why do we need such constructors?
9. What is a wrapper class?
10. What is an immutable object?
11. Can we declare a variable inside an interface? If yes, then what should be the variable’s modifiers?
12. What is an Abstract Class?
13. What is coupling and cohesion?
14. What is type-casting?
15. What is the default value of a ‘char’ variable?
16. What is the difference between ‘Bitwise AND’ and ‘Logical AND’ operator?
17. How do you iterate through a HashMap?
18. What are the advantages of using ArrayList<String> over String Array (String[]) ?
19. What is Generics?
20. What is Reflection?
21. What is Auto-Boxing?
22. How are Javadoc comments different from normal comments?
23. What is a Object Factory Method?
24. What is Var Args?
25. Is it possible to write a try block without catch?

I hope you like these questions. Comments are welcome with any query or doubt.

[Update: I have started writing the answers as separate blogs. The answered blog posts are hyperlinked from the questions.]