Java OOPS Interview questions

Java OOPS Interview questions:
1. What are the principle concepts of OOPS
2. What is Abstraction
3. What is Encapsulation
4. What is Inheritance
5. What is Polymorphism ?
6. What is the difference between object oriented programming language and object based programming language
7. What is the difference between abstraction and encapsulation ?
8. Explain the different forms of Polymorphsim
9. What is runtime polymorphism or dynamic method dispatch?
10.How does Java implement polymorphsim?