What is virtual class in OOPs?

In object-oriented programming, a virtual class is a nested inner class whose functions and member variables can be overridden and redefined by subclasses of an outer class. Virtual classes are analogous to virtual functions. (Just like the run time type of an object decides which virtual function should be used.)

What is polymorphism and virtual function?

A virtual function is a member function which is declared in the base class using the keyword virtual and is re-defined (Overriden) by the derived class. The term Polymorphism means the ability to take many forms. It occurs if there is a hierarchy of classes which are all related to each other by inheritance.

What is virtual polymorphism?

A virtual function is a special type of function that, when called, resolves to the most-derived version of the function that exists between the base and derived class. This capability is known as polymorphism.

What is the difference between virtual function and virtual class?

A virtual function is a member function of base class which can be redefined by derived class. A pure virtual function is a member function of base class whose only declaration is provided in base class and should be defined in derived class otherwise derived class also becomes abstract.

Why polymorphism is used in OOP?

Polymorphism is one of the core concepts in OOP languages. It describes the concept that different classes can be used with the same interface. Each of these classes can provide its own implementation of the interface.

What is called polymorphism?

The word polymorphism means having many forms. In simple words, we can define polymorphism as the ability of a message to be displayed in more than one form. A real-life example of polymorphism, a person at the same time can have different characteristics.

What is polymorphism in OOP?

The most common use of polymorphism in OOP occurs when a parent class reference is used to refer to a child class object. Actually here it is talking about Dynamic Polymorphism (which I will describe next).

What is polymorphism in Java?

Polymorphism is the ability of an object to take on many forms. Any Java object that can pass more than one IS-A test is considered to be polymorphic — tutorialspoint. This means any child class object can take any form of a class in its parent hierarchy and of course itself as well.

How to use polymorphism to solve a problem like this?

You can use polymorphism to solve this problem in two basic steps: 1 Create a class hierarchy in which each specific shape class derives from a common base class. 2 Use a virtual method to invoke the appropriate method on any derived class through a single call to the base class… More

What happens when an object is declared as polymorphic?

When this polymorphism occurs, the object’s declared type is no longer identical to its run-time type. Base classes may define and implement virtual methods, and derived classes can override them, which means they provide their own definition and implementation.