Million Dollar Question

Question 1

Can a interface implement class?

Answer 1

False

Question 2

Can a abstract class have a abstract method?

Answer 2

True

Question 3

Can a interface have a abstract method?

Answer 3

True

Question 4

What kind of field can a abstract class have?

Answer 4

Any kind, as long as it is a class (static, instance, finanl, non-final)

Question 5

What kind of field can a interface class have?

Answer 5

only constant which is public, static and final

Question 6

Can a abstract class have a constructor?

Answer 6

True

Question 7

Can interface class have a constructor?

Answer 7

False

Question 8

Can a abstract class have a instance block?

Answer 8

yes, you can have anything

Question 9

Can abstract classes have a concrete method?

Answer 9

True

Question 10

Can interface have a method that has a body?

Answer 10

default and static method must have body

Question 11

Can a abstract class implement multiple interface?

Answer 11

True

Question 12

Can a abstract class extend multiple another class?

Answer 12

False

Question 13

Can a interface implement a class?

Answer 13

False

Question 14

Can a interface extend another interface?

Answer 14

True

Question 15

Can a class implement other class?

Answer 15

False

Question 16

Can interface extend multiple another interface

Answer 16

True

Question 17

Can a interface can have any other access modifier ?

Answer 17

only public, if it is protected it will not compile

Question 18

Member of interface can be static?

Answer 18

False, it cannot.

Question 19

Does Interface contains Data Member?

Answer 19

False

Question 20

Does abstract contains Data Member?

Answer 20

True