Object-Oriented Programming (OOP) is a programming paradigm that organizes software design around data, or objects, rather than functions and logic. In OOP, objects are instances of classes, and a class serves as a blueprint for creating objects.
Object-oriented programming is the successor of procedural (structural) programming.
The main advantages and goals of OOP are to make complex software faster to develop and easier to maintain. OOP enables the easy reuse of code by applying simple and widely accepted rules (principles).
C# is an object-oriented programming language, meaning that it supports OOP concepts and encourages the use of object-oriented principles. The four main pillars of OOP in C# are:
1. Encapsulation :- Encapsulation We will learn to hide unnecessary details in our classes and provide a clear and simple interface for working with them.
2. Abstraction :- Abstraction We will learn how to work through abstractions: to deal with objects, considering their important characteristics, and ignore all other details
3. Inheritance :- Inheritance We will explain how class hierarchies improve code readability and enable the reuse of functionality.
4. Polymorphism :- Polymorphism We will explain how to work in the same manner with different objects, which define a specific implementation of some abstract behavior.
Advantages of OOPS
1. Modularity, reusability, and maintainability through objects and classes.
2. Data security and flexibility via encapsulation and inheritance.
3. Collaboration and debugging improvements in team environments.
4. The ability to model real-world systems intuitively.
C# Object-Oriented Programming (OOPs) – Interview Questions
Q 1: What is OOP?
Ans: OOP is a programming approach based on objects.
Q 2: Name four OOP principles.
Ans: Encapsulation, Inheritance, Polymorphism, Abstraction.
Q 3: Why use OOP?
Ans: It improves code reuse, security, and scalability.
Q 4: Is C# an OOP language?
Ans: Yes, fully object-oriented.
Q 5: What is an object?
Ans: An instance of a class.