In software development, the "backend" refers to the server-side of an application. This includes the database and any server-side logic that handles data storage, retrieval, and manipulation. The backend also includes the application's API, which is the interface used by the frontend (typically a web or mobile application) to communicate with the server. The backend is responsible for handling requests from the frontend, processing data, and returning the results to the frontend.
Some examples of common technologies used to build the backend of web applications include:
- Languages such as Java, Python, Ruby, and C#
- Frameworks such as Express.js (JavaScript), Flask (Python), Ruby on Rails (Ruby), and ASP.NET (C#)
- Databases such as MySQL, PostgreSQL, MongoDB, and SQL Server
- Server infrastructure such as Linux, Apache, and Nginx
An example of a simple backend for a web application could be written using the Express.js framework in JavaScript and using MongoDB as the database. The backend would handle requests from the frontend, such as user registration or submitting a form, by saving or retrieving data from the MongoDB database. It also handle Authentication, Authorization, validation , security and other functionality that the frontend don't need to handle.
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