Question

If a subclass of an abstract class does not provide implementation code for all the abstract methods of its superclass, it too becomes an _______

a. Abstract class
b. Concrete class
c. Interface
d. Singleton class

Answer 1

If a subclass of an abstract class does not provide implementation code for all the abstract methods of its superclass, it becomes an abstract class.

Step-by-step explanation:

If a subclass of an abstract class does not provide implementation code for all the abstract methods of its superclass, it becomes an abstract class. An abstract class is a class that cannot be instantiated and is meant to be extended by other classes. It serves as a blueprint for its subclasses, providing default implementation code for some methods while leaving others as abstract (unimplemented) for the subclasses to define.

For example, consider an abstract class called Shape that has an abstract method called calculateArea(). Any subclass of Shape, such as Circle or Rectangle, must provide its own implementation for the calculateArea() method. If a subclass fails to provide an implementation code for an abstract method, it also becomes an abstract class.

In this case, since the subclass did not provide implementation code for all the abstract methods of its superclass (the abstract class), it becomes an abstract class itself.