Back-End

Tip

The back-end is the part of a web application or system that handles the server-side operations, meaning it works behind the scenes to manage and process data, logic, and server responses. It powers the functionality of the front-end, which is the part of the application that users directly interact with.

├── concepts/
│   ├── Node.js/
│   ├── api-design/
│   │   └── rest-vs-graphql.md
│   └── authentication/
│       └── jwt-vs-oauth.md
├── frameworks/
│   ├── express/
│   │   └── express-setup.js
│   ├── django/
│   └── laravel/
├── databases/
│   ├── sql/
│   └── mongodb/
├── Most Asked Interview Questions/
│   ├── Node.js/
│   ├── JavaScript/
├── code-snippets/
│   ├── middleware/
│   └── database-queries/
└── README.md

Here are the main responsibilities of the back-end:

1. Data Processing

• Handles requests sent by the front-end.
• Processes and validates the data submitted by users (e.g., login details, form submissions).

2. Database Management

• Stores, retrieves, updates, or deletes data in a database.
• Examples of databases: MySQL, PostgreSQL, MongoDB, SQLite.

3. Server Logic

• Implements the core logic for business operations.
• Runs calculations, automates tasks, or handles API integrations.

4. Server Management

• Maintains the server that hosts the application.
• Ensures the app runs smoothly, securely, and efficiently.

5. Security

• Protects sensitive data like passwords, payment details, and user information.
• Implements authentication (e.g., login systems) and authorization (e.g., user roles).

Common Back-End Technologies:

• Languages: JavaScript (Node.js), Python, PHP, Java, Ruby, C#, etc.
• Frameworks: Express.js, Django, Laravel, Spring Boot, etc.
• Databases: MongoDB, PostgreSQL, MySQL, etc.
• APIs: REST, GraphQL.