OOP's concept

What is C language?

The C programming language is a standardized programming language developed in the early 1970s by Ken Thompson and Dennis Ritchie for use on the UNIX operating system.

Q1. What is Object Oriented Programming?

Ans:-

a)     Object Oriented Programming decomposes a program into real world entities called as objects and then creates data and function around these objects.  

b)    Object Oriented Programming is based on 4 major pillars which are as follows:

                                                                   i.            Abstraction:-

This deals with identifying the key aspects of a system. This is normally required during requirement analysis phase.

                                                                 ii.            Encapsulation:-

The key aspects identified during abstraction are secured using encapsulation. This deals with hiding the interface from implementation. Hence its purpose is security.

                                                              iii.            Inheritance:-

This deals with incorporating the essential features from a base class in a derived class. Thus it helps in reusability of methods and its main purpose is for grouping.

                                                              iv.            Polymorphism:-

This helps when a same message is sent by different objects to obtain different behaviour from a method.

    c)   Object Oriented Programming also has 3 minor pillars which are as follows:

                                                                   i.            Strong type casting:-

This helps in avoiding mixing of abstraction i.e. key aspects identified during requirement analysis.

                                                                 ii.            Persistence:-

This helps in a safe state of an object.

                                                              iii.            Concurrency:-

This deals with simultaneously performing various tasks for better performance.

Q2. What is an object and a class?

Ans:-

a)     Object:-

·        An object is an real-world entity that has a structure and behaviour

·        The characteristics of an object are as follows:-

                                                                   i.            Identity

                                                                 ii.            State

                                                              iii.            Behaviour

                                                              iv.            Responsibility

b)    Class:-

·        A class is a template.

·        It can also be described as a collection of data members and member functions.