What is OOP's Concepts in APEX Programming ? Object-Oriented Programming System (OOPs) is a programming concept that works on the principles of abstraction , encapsulation , inheritance , and polymorphism . It allows users to create objects they want and create methods to handle those objects. The basic concept of OOPs is to create objects, re-use them throughout the program, and manipulate these objects to get results. OOP meaning “Object Oriented Programming” is a popularly known and widely used concept in modern programming languages like Java, Apex and many other. List of OOP's Concepts > Class : The class is one of the Basic concepts of OOPs which is a group of similar entities. It is only a logical component and not the physical entity. Lets understand this one of the OOPs Concepts with example, if you had a class called “Expensive Cars” it coul...