1. Which keyword is used to declare an abstract class?

2. Can we create an object of an abstract class?

3. Abstract class can contain?

4. Which is TRUE about abstract methods?

5. If a class has one abstract method, then class must be?

6. Which keyword is used to extend an abstract class?

7. A subclass of an abstract class must?

8. Can abstract class have constructor?

9. Which access modifier is NOT allowed for abstract methods?

10. Can abstract methods be final?

11. Can abstract class implement an interface?

12. Which is true about abstract class variables?

13. Abstract class supports which inheritance?

14. Can abstract class extend another abstract class?

15. What happens if subclass does not override abstract method?

16. Can abstract methods be static?

17. Which is correct about abstract class?

18. Which is TRUE?

19. What is the main use of abstract class?