OOP in C# | PPL

Object Oriented programming in C#:


Object Oriented programming is a programming style which is associated with the concepts like class, object, Inheritance, Encapsulation, Abstraction, Polymorphism.
Class: A class is a collection of method and variables.

We can define a class using the class keyword and the class body enclosed by a pair of curly braces, as shown in the following example:


public class A
{

}


Inheritance: Inheritance feature allows code reusability when a class includes property of another class. In C# “:” is used to represent inheritance, as shown in the following example:


public class Papa {
 
}

class Child : Papa {

}

Objects: Object is a component of a program that knows how to perform certain actions and how to interact with other elements of the program, as shown in the following example:

Rectangle Rect = new Rectangle();

Here, Rectangle is a class, Rect is an object of class Rectangle, new is a keyword, Rectangle() is a constructor of class Rectangle.

Abstraction: Abstraction can be achieved using abstract classes in C#. Abstract classes contain abstract methods, which are implemented by the derived class.

Encapsulation: Encapsulation means bundling of data and methods within one unit, e.g., a class in C#. Encapsulation enables a programmer to implement the desired level of abstraction.

Polymorphism: Polymorphism means overloading and overriding, as shown in the following example:
Polymorphism overloading example:

using System;
namespace PolyOverloadingExample
{
 public class OverLoading
 {
   public void sum(int a, int b)
   {
     Console.WriteLine(a + b);
   }
   public void sum(int a, int b, int c)
   {
     Console.WriteLine(a + b + c );
   }
 }
}

Polymorphism overriding example:

using System;
namespace PolyOverridingExample
{
 public class Parent
 {
   public virtual void Show()
   {
     Console.WriteLine("Welcome");
   }
 }
 
 public class Child:Parent
 {
   public override void Show()
   {
     Console.WriteLine("Swagatam");
   }
 }
}



Viva Vice on OOP in C#

Q1. The capability of an object in Csharp to take number of different forms and hence display behaviour as according is known as:-
Ans. Polymorphism.

Q2. Which of the following keyword is used to change data and behavior of a base class by replacing a member of the base class with a new derived member?
Ans. New.

Q3. What is the correct way to overload +operator?
Ans. public sample operator + ( sample a, sample b), public abstract operator + (sample a,sample b). 

Q4. Selecting appropriate method out of number of overloaded methods by matching arguments in terms of number,type and order and binding that selected method to object at compile time is called?
Ans. Compile time polymorphism.

Q5. Correct syntax for while statement is:-
Ans. 
while(condition)
{
}

Principles of Programming Languages

EasyExamNotes.com covered following topics in PPL.

Practicals:
Previous years solved papers:
A list of Video lectures
References:
  1. Sebesta,”Concept of programming Language”, Pearson Edu 
  2. Louden, “Programming Languages: Principles & Practices” , Cengage Learning 
  3. Tucker, “Programming Languages: Principles and paradigms “, Tata McGraw –Hill. 
  4. E Horowitz, "Programming Languages", 2nd Edition, Addison Wesley

Python Programming ↓ 👆
Java Programming ↓ 👆
JAVA EasyExamNotes.com covered following topics in these notes.
JAVA Programs
Principles of Programming Languages ↓ 👆
Principles of Programming Languages
EasyExamNotes.com covered following topics in these notes.

Practicals:
Previous years solved papers:
A list of Video lectures References:
  1. Sebesta,”Concept of programming Language”, Pearson Edu 
  2. Louden, “Programming Languages: Principles & Practices” , Cengage Learning 
  3. Tucker, “Programming Languages: Principles and paradigms “, Tata McGraw –Hill. 
  4. E Horowitz, "Programming Languages", 2nd Edition, Addison Wesley

    Computer Organization and Architecture ↓ 👆

    Computer Organization and Architecture 

    EasyExamNotes.com covered following topics in these notes.

    1. Structure of desktop computers
    2. Logic gates
    3. Register organization
    4. Bus structure
    5. Addressing modes
    6. Register transfer language
    7. Direct mapping numericals
    8. Register in Assembly Language Programming
    9. Arrays in Assembly Language Programming

    References:

    1. William stalling ,“Computer Architecture and Organization” PHI
    2. Morris Mano , “Computer System Organization ”PHI

    Computer Network ↓ 👆
    Computer Network

    EasyExamNotes.com covered following topics in these notes.
    1. Data Link Layer
    2. Framing
    3. Byte count framing method
    4. Flag bytes with byte stuffing framing method
    5. Flag bits with bit stuffing framing method
    6. Physical layer coding violations framing method
    7. Error control in data link layer
    8. Stop and Wait scheme
    9. Sliding Window Protocol
    10. One bit sliding window protocol
    11. A protocol Using Go-Back-N
    12. Selective repeat protocol
    13. Application layer
    References:
    1. Andrew S. Tanenbaum, David J. Wetherall, “Computer Networks” Pearson Education.
    2. Douglas E Comer, “Internetworking with TCP/IP Principles, Protocols, And Architecture",Pearson Education
    3. KavehPahlavan, Prashant Krishnamurthy, “Networking Fundamentals”, Wiley Publication.
    4. Ying-Dar Lin, Ren-Hung Hwang, Fred Baker, “Computer Networks: An Open Source Approach”, McGraw Hill.