Web application concepts

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Web applications are software programs that are accessed using a web browser over the internet. They are built using a combination of technologies, including HTML, CSS, JavaScript, and server-side programming languages like PHP, Python, or Ruby. Here are some key concepts related to web applications:

  • Client-side vs. Server-side: Web applications can be divided into two categories based on where the processing takes place. Client-side applications run entirely in the browser and rely on JavaScript to handle user interactions and data manipulation. Server-side applications run on a web server and generate dynamic content that is sent to the client for display.
  • Front-end vs. Back-end: Web applications can also be divided into two categories based on the development tasks. The front-end of a web application is the user interface that the user interacts with. It's built using HTML, CSS, and JavaScript. The back-end of a web application is the part that handles data storage, business logic, and interactions with other systems. It's built using server-side programming languages like PHP, Python, or Ruby.
  • APIs: An API (Application Programming Interface) is a set of protocols and tools that allow different software applications to communicate with each other. Web applications often use APIs to access data or functionality from other applications or services.
  • Databases: A database is a structured collection of data that is used to store and retrieve information. Web applications often use databases to store user information, application data, or other types of data.
  • Security: Web applications must be designed with security in mind to prevent unauthorized access, data breaches, or other security risks. Some common security practices for web applications include input validation, authentication, encryption, and access control.

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