Method Overriding

What is Polymorphism in OOP?

Polymorphism is the object-oriented principle that lets objects of different classes respond to the same method call in their own class-specific way.

What is Inheritance in OOP?

Inheritance is the object-oriented mechanism by which a class (the subclass) acquires the fields and methods of another class (the superclass), enabling code r…

Method Overloading vs Overriding

Method overloading is defining multiple methods with the same name but different parameter lists within a class, resolved at compile time, while method overrid…

What is Method Overriding in OOP?

Method overriding is when a subclass provides its own implementation of a method already defined in its superclass, using the same name and signature.

Covariance and Contravariance Explained

Covariance and contravariance describe how subtyping relationships between types carry over to derived types like arrays, generics, and function signatures — c…

What Does super Do in OOP?

"super" is a keyword used inside a subclass to call a method or constructor defined on its parent class, most commonly to invoke the parent constructor or to e…

How Do Virtual Method Tables (vtables) Work?

A virtual method table (vtable) is a per-class array of function pointers that the runtime consults through a hidden pointer stored in each object, allowing a…

What is a Pure Virtual Function?

A pure virtual function is a C++ member function declared with '= 0' that has no implementation in the class that declares it, forcing every concrete (non-abst…

What is an Abstract Method?

An abstract method is a method declared with a signature but no body, defined only inside an abstract class or interface, which every concrete subclass or impl…