1. Tell me the OOP'S concepts in Java ?
2. Can abstract class contain constructor or not ?
3. Difference between Interface and Abstract class ?
4. Can Interface have Inner class ?
5. How to throw "IllegalArgumentException"?
6. What is JDK and JRE , explain about these.
7. Threads read and write problem ? (Write the code).
8. Tell me about Serialization in Java ?
9. Inheritance concepts and Object creation possibilities in Inheritance ?
10. What is Collection and Vector ?
11. Write the Code for Singleton's class ?
12. Tell me about Android Framework ?
13. What is a Service in Android ?
