Một số câu hỏi java core

Một số câu hỏi java core

1. What is OPP? 4 main feeatures of OPP? 
2. Compare overloading and overriding?
3. Compare abstract class and interface?
4. What is static variable, static method, static block?
5. What is equals(), hashCode(), toString() method?
6. Compare deep coppy and shallow coppy?
7. What is final class/method/variable?
8. What is java generic? Compare java.util.List, Map, Set?
9. Compare ArrayList and Vector?
10. How to sort a collection?
11. Compare mutable and immutable object?
12. Compare throw and thows? checked and unchecked exception?
13. What is thread? how many ways to create a new thread?
14. What is synchronized keyword? deadlock?