OOP concepts with examples

Question

Accepted Answer

OOP concepts include inheritance, encapsulation, polymorphism, and abstraction.

Inheritance: Allows a class to inherit properties and behavior from another class. Example: Animal class can be inherited by Dog class.
Encapsulation: Bundling data and methods that operate on the data into a single unit. Example: Using private variables and public methods in a class.
Polymorphism: Ability for objects to be treated as instances of their parent class. Example: Animal class can have a method 'makeSound' which can be overridden in Dog class.
Abstraction: Hiding the complex implementation details and showing only the necessary features of an object. Example: Car class can have a method 'start' without revealing the internal engine workings.

Popular interview questions of Software Development Engineer