A class based on another class is called:

• A. A class that is based on another class
• B. A class that cannot be instantiated
• C. A standalone data structure with no inheritance
• D. A class that stands alone without inheritance

Answer: (D)

Inheritance is the mechanism at work here. When a class is defined based on another class, it’s extending or deriving from that existing class. The new class is called a subclass (also known as a derived class or child class). It inherits the base class’s fields and methods, and it can add new members or override existing behavior to customize or specialize functionality.

So, a class based on another is best described as a subclass. The idea described by “stands alone without inheritance” would refer to a class that has no parent, i.e., it isn’t derived from another class, which isn’t what’s being asked in this scenario.