OOP

Question 1

What is OOP?

Answer 1

Object Oriented Programming is a programming paradigm based on the concepts of objects. These objects contain data in form of fields and procedures in form of methods.

Question 2

4 basic principles of OOP

Answer 2

Encapsulation
Abstraction
Inheritence
Polymorphism

Question 3

Encapsulation

Answer 3

It is a mechanism of restricting access to certain details of the object and only exposing the necessary parts through public methods.

Question 4

Abstraction

Answer 4

Involves hiding the complex implementation details of a system and exposing only the essential features. It allows you to focus on what an object does rather than how it does it.

Done using Abstract classes and Inteface

Question 5

Inheritance

Answer 5

Allows a new class (derived class or child class) to inherit properties and methods from an existing class (base class or parent class). This promotes code reuse and establishes a natural hierarchy between classes.

Question 6

Polymorphism

Answer 6

Allows objects of different classes to be treated as objects of a common superclass. It is the ability of an object to take on many forms. The most common use of polymorphism in OOP occurs when a parent class reference is used to refer to a child class object.

Question 7

Access Modifiers

Answer 7

Private - same file
Protected - derived classes any assembly
Internal - same assembly
Public - whole code base
Private Protected - derived classes same assembly
Protected Internal - same assembly and any derived classes