Interfaces And Abstract Classes - Practice Test

(A) Only if the abstract methods are marked as "static"

(B) Only if the non-abstract methods are marked as "private"

(C) Yes, an abstract class can have both abstract and non-abstract methods

(D) No, abstract classes can only have abstract methods

(C) Yes, an abstract class can have both abstract and non-abstract methods

(A) To mark a method as abstract

(B) To create a new interface

(C) To declare a class

(D) To specify the default implementation of a method

(D) To specify the default implementation of a method

(A) Only if the class is marked as "final"

(B) Only if both the interface and abstract class have the same methods

(C) No, it is not allowed

(D) Yes, a class can implement an interface and extend an abstract class

(D) Yes, a class can implement an interface and extend an abstract class

(A) InputStream

(B) OutputStream

(C) Character Stream

(D) All of the mentioned

(C) Character Stream

(A) import pkg.

(B) Import pkg.

(C) import pkg.*

(D) Import pkg.*

(C) import pkg.*

Interfaces And Abstract Classes - Study Mode