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OOPS Features of C# in brief

By Vithal Wadje Blogs | C# Language Nov 08, 2012
In this blog i have explained OOPS Features of C# in brief
Background

In this blog i have explained OOPS Features of C#  in brief  to help new comer's to crack an interview,i have explained these feature in brief because of focsing on new comer's to give them a idea how to answer thes questions which are often asked in an  interview .

Introduction

The programming in which data is logically represented in the form of a class and physically represented in the form an object is called as object oriented programming (OOP). OOP has the following important features.

  • Class
In OOP languages it is must to create a class for representing data. Class contains variables for storing data and functions to specify various operations that can be performed on data. Class will not occupy any memory space and hence it is only logical representation of data.

  • Encapsulation
Within a class variables are used for storing data and functions to specify various operations that can be performed on data. This process of wrapping up of data and functions that operate on data as a single unit is called as data encapsulation.

  • Abstraction
Within a class if a member is declared as private, then that member can not be accessed from out side the class. I.e. that member is hidden from rest of the program. This process of hiding the details of a class from rest of the program is called as data abstraction. Advantage of data abstraction is security.

  • Object and Instance

Class will not occupy any memory space. Hence to work with the data represented by the class you must create a variable for the class, which is called as an object. When an object is created by using the keyword new, then memory will be allocated for the class in heap memory area, which is called as an instance and its starting address will be stored in the object in stack memory area.

When an object is created without the keyword new, then memory will not be allocated in heap I.e. instance will not be created and object in the stack contains the value null. When an object contains null, then it is not possible to access the members of the class using that object.

  • Inheritance
Creating a new class from an existing class is called as inheritance. When a new class requires same members as an existing class, then instead of recreating those members the new class can be created from existing class, which is called as inheritance. Advantage of inheritance is reusability of the code. During inheritance, the class that is inherited is called as base class and the class that does the inheritance is called as derived class.

  • Polymorphism
Polymorphism means having more than one form. Polymorphism can be achieved with the help of overloading and overriding concepts. Polymorphism is classified into compile time polymorphism and runtime polymorphism.

Summary

I hope this blog is useful for all readers,if you have any suggestion then contact me.
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