Summary  
This chapter explains the division between client-side interface code and server-side logic code and how they interact through request–response communication.  

General domain of usage  
Web applications

A web application has two main parts: Frontend and Backend. They work together to deliver everything you see and use online.

## Frontend
The Frontend is what users see in the browser: text, images, buttons, forms, and layouts.

What the Frontend does:
- Shows content on the screen;
- Handles user actions (clicks, typing, forms);
- Provides navigation and interaction.

Frontend = the visible part of the website.

## Backend
The Backend works behind the scenes, running on servers. It processes data and powers the application's logic.

What the Backend does:
- Works with databases;
- Processes requests from the Frontend;
- Sends back data and results.

Backend = the hidden logic that makes the website work.

## How the Frontend Communicates with the Backend
1. The Frontend asks for data (a request);
2. The Backend processes it and returns the result (a response);
3. The Frontend displays the updated information.

Which of the following best describes the difference between Frontend and Backend Development?

Understand how the web works and how websites are built. Explore the Internet, how pages are delivered, and the difference between frontend and backend development.

Frontend and Backend Development Explained

Frontend

Backend

How the Frontend Communicates with the Backend

1. What is Frontend responsible for?

2. Which of the following best describes the difference between Frontend and Backend Development?