Polymorphism and Abstract Classes in Programming

What is the primary role of polymorphism in object-oriented programming?

What characterizes an abstract class in object-oriented programming?

Which of the following statements about pure virtual functions is true?

What is the purpose of virtual destructors in a base class?

Which of the following is an example of a concrete class?

Polymorphism

Polymorphism enables a method to exhibit different behaviors depending on the object it's invoked on.
A draw method, for example, can produce different outputs for Line, Circle, and Triangle objects.

Abstract Classes

Abstract classes represent conceptual categories without direct real-world instantiations (e.g., Shape).
They contain pure virtual functions (declared with = 0), like draw() in Shape.
Objects of abstract classes cannot be created; only objects of their derived concrete classes can be instantiated.

Concrete Classes

Concrete classes implement all necessary functionality and can be instantiated.
Rectangle is an example of a concrete class derived from the abstract Shape class.

Pure Virtual Functions

Pure virtual functions are declared with = 0 in the base class.
They enforce derived classes to provide their own specific implementations.
The draw() method within the Shape class is a pure virtual function.

Virtual Destructors

Virtual destructors are crucial for ensuring the proper destruction of derived class objects when using base class pointers.

This quiz covers key concepts of polymorphism, abstract classes, and concrete classes in programming. You'll explore how these elements interact and are utilized in object-oriented design, including the role of pure virtual functions. Test your understanding of these fundamental programming concepts.