Which description best defines Inheritance?

Which description best defines Inheritance?

• A. When a subclass gets the variables and methods of a super class.
• B. When a subclass hides a method by using a different name.
• C. When a class is prevented from being instantiated.
• D. When a method in a subclass has no parameters.

Answer: (A)

Inheritance is when a subclass gains the fields and behaviors defined in its superclass, so the subclass can use those members as if they were its own. This creates an is-a relationship and lets you reuse code: the subclass automatically has the superclass’s variables and methods, can use them directly, and can add new features or override existing behavior to customize what happens. For example, if there is a class Animal with a move method, a Dog class that inherits from Animal will have move available and can also define its own barking behavior. Keep in mind that private members of the superclass aren’t accessible directly in the subclass, though they still exist as part of the object. The description described here best captures inheritance, whereas other scenarios—such as hiding a method by renaming, preventing a class from being instantiated, or a method having no parameters—do not define inheritance.

Inheritance is when a subclass gains the fields and behaviors defined in its superclass, so the subclass can use those members as if they were its own. This creates an is-a relationship and lets you reuse code: the subclass automatically has the superclass’s variables and methods, can use them directly, and can add new features or override existing behavior to customize what happens. For example, if there is a class Animal with a move method, a Dog class that inherits from Animal will have move available and can also define its own barking behavior. Keep in mind that private members of the superclass aren’t accessible directly in the subclass, though they still exist as part of the object. The description described here best captures inheritance, whereas other scenarios—such as hiding a method by renaming, preventing a class from being instantiated, or a method having no parameters—do not define inheritance.