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OOPs is object-oriented programming language while function-oriented programming language focuses on functions.

• OOPs focuses on objects and classes while function-oriented programming focuses on functions

• OOPs supports encapsulation, inheritance, and polymorphism while function-oriented programming does not

• OOPs is more suitable for large-scale projects while function-oriented programming is more suitable for small-scale projects

• Examples of OOPs languages include Java, C++, and ...read more

OOPs concepts are the fundamental principles of object-oriented programming.

• Abstraction: Hiding implementation details and showing only necessary information.

• Encapsulation: Binding data and functions that manipulate data together.

• Inheritance: Acquiring properties and behavior of a parent class by a child class.

• Polymorphism: Ability of objects to take many forms or have multiple behaviors.

• Class: Blueprint for creating objects with properties and methods.

• Object: Instance of a c...read more

Abstract classes are classes that cannot be instantiated, while interfaces are a collection of abstract methods.

• Abstract classes can have both abstract and non-abstract methods, while interfaces can only have abstract methods.

• A class can implement multiple interfaces, but can only inherit from one abstract class.

• Abstract classes can have constructors, while interfaces cannot.

• Interfaces can have default methods with implementation, while abstract classes cannot.

Abstract class can have implementation while interface cannot. A class can implement multiple interfaces but not abstract classes.

• Abstract class can have constructors while interface cannot.

• Abstract class can have non-abstract methods while interface cannot.

• Abstract class can have access modifiers while interface methods are public by default.

• A class can implement multiple interfaces but can inherit only one abstract class.

• Abstract classes are used when some common functional...read more

Async/await in Node.js is a feature that allows for asynchronous code to be written in a synchronous manner.

• Async/await is a way to write asynchronous code that looks like synchronous code, making it easier to read and maintain.

• It allows you to write asynchronous functions using the async keyword and await promises inside those functions.

• Async/await is built on top of promises and is supported in Node.js version 7.6 and above.

• Using async/await can help avoid callback hell and...read more

SOLID principles are a set of guidelines for writing maintainable and scalable code in .Net.

• Single Responsibility Principle (SRP) - each class should have only one responsibility

• Open/Closed Principle (OCP) - classes should be open for extension but closed for modification

• Liskov Substitution Principle (LSP) - derived classes should be able to substitute their base classes

• Interface Segregation Principle (ISP) - clients should not be forced to depend on interfaces they do not us...read more