IGNOU BCA 3rd sem Solved Assignment - What is inheritance? What are different types of inheritance? Explain advantages of using inheritance

What is inheritance? What are different types of inheritance? Explain advantages of using inheritance

Ans

Inheritance:-Inheritance means using the Pre-defined Code This is very Main Feature of OOP With the advantage of Inheritance we can use any code that is previously created. With the help of inheritance we uses the code that is previously defined but always Remember, We are only using that code but not changing that code. With the Advent of inheritance we are able to use pre-defined code and also able to add new code. All the pre-defined code is reside into the form of classes if we want to use that code then we have to inherit or extend that class.

The Class that is Pre-defined is called as Base or super Class and the class which uses the Existing Code is known as derived or sub class The Various Types of Inheritance those are provided by C++ are as followings:

1.                Single Inheritance

2.                Multilevel Inheritance

3.                Multiple Inheritance

4.                Hierarchical Inheritance

5.                Hybrid Inheritance

In Inheritance Upper Class whose code we are actually inheriting is known as the Base or Super Class and Class which uses the Code are known as Derived or Sub Class.

Single Inheritance

when a single derived class is created from a single base class then the inheritance is called as single inheritance.

Different types of inheritance

Single Inheritance Example Program

2. Hierarchical Inheritance

when more than one derived class are created from a single base class, then that inheritance is called as hierarchical inheritance.

Hierarical Inheritance

3. Multi Level Inheritance

when a derived class is created from another derived class, then that inheritance is called as multi level inheritance.

Multi level Inheritance

4. Hybrid Inheritance

Any combination of single, hierarchical and multi level inheritances is called as hybrid inheritance.

Hybrid inheritance in C#

5. Multiple Inheritance

when a derived class is created from more than one base class then that inheritance is called as multiple inheritance. But multiple inheritance is not supported by .net using classes and can be done using interfaces.

Multiple inheritance in C#

  Multiple Inheritance Example

Handling the complexity that causes due to multiple inheritance is very complex. Hence it was not supported in dotnet with class and it can be done with interfaces.

advantages of using inheritance

1. Allows the code to be reused as many times as needed. The base class once defined and once it is compiled, it need not be reworked.

1. Saves time and effort as the main code need not be written again

1. Inheritance allows the use of an already-developed class to write a new class of the same kind.

4. In the development of a new project/program, it is possible to define classes and inherit these from the appropriate base class. It helps to reduce source code size and hence improve readability and maintainability of the system.

5. It is possible to implement dynamic polymorphism  by using inheritance.

Enhancement of programs becomes easy by using inheritance