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Object Oriented Programming & Methodolog Viva Voce

What do you mean by object-oriented thinking ?

Object oriented thinking involves writing of classes, which represents objects in problem domains.

For example,

Writing a program for student management, than we can create object studentm fee reciept, attendance, etc.

What is Object Oriented Programming ?

The programming which involves use of classes and objects.

Some examples of object oriented programmins are:

  • C++
  • Java
  • Python
  • C#, etc.

What is procedural programming language ?

programming language that describes a sequence of well-organized actions and processes.

Some examples of procedureal programming language:

  • C programming
  • Cobol
  • Algol
  • Fortran

Features of object oriented programming ?

  • Inheritance
  • Encapsulation
  • Abstraction
  • Polymorphism
  • Method Overriding
  • Method Overloading
  • Objects
  • Classes
  • Constructors and Destructors

Merits and demerits of object oriented methodology ?

Merits of object oriented methodology

  • Reuse of code using class
  • Easy to maintain

Demerits of object oriented methodology

  • Complex to create programs

What is encapsulation ?

Encapsulation is defined as the wrapping up of data under a single unit.

How to implement encapsulation in C++ ?

class Rectangle {
    int length;
    int breadth;

    int getArea() {
      return length * breadth;

Class binds variables and methods.

What is data abstraction ?

Providing only essential information about the data to the outside world, hiding the background details or implementation.

How to implement data abstraction in C++ ?

Create a method, and call it when required. Without rewriting code.

#include <iostream>
class implementAbstraction
        int a=100;

        void show()
            cout<<"a = " <<a << endl;
int main() 
    implementAbstraction obj;;
    return 0;

Categories OOP