As JavaScript is widely used in Web Development, in this article we will explore some of the Object Oriented mechanisms supported by JavaScript to get the most out of it. Some of the common interview questions in JavaScript on OOPS include:

• How is Object-Oriented Programming implemented in JavaScript? 
• How does it differ from other languages? 
• Can you implement Inheritance in JavaScript?

Object: An Object is a unique entity that contains properties and methods. For example “a car” is a real-life Object, which has some characteristics like color, type, model, and horsepower and performs certain actions like driving. The characteristics of an Object are called Properties in Object-Oriented Programming and the actions are called methods. An Object is an instance of a class. Objects are everywhere in JavaScript, almost every element is an Object whether it is a function, array, or string.

Classes: Classes are blueprints of an Object. A class can have many Objects because the class is a template while Objects are instances of the class or the concrete implementation. Before we move further into implementation, we should know unlike other Object Oriented languages there are no classes in JavaScript we have only Object. To be more precise, JavaScript is a prototype-based Object Oriented Language, which means it doesn’t have classes, rather it defines behaviors using a constructor function and then reuses it using the prototype.

Abstraction: Abstraction means displaying only essential information and hiding the details. Data abstraction refers to providing only essential information about the data to the outside world, hiding the background details or implementation.

Inheritance: It is a concept in which some properties and methods of an Object are being used by another Object. Unlike most of the OOP languages where classes inherit classes,