# Django Channels (Django)

> WebSockets, ASGI, consumers, routing, channel layers, authentication, real-time features

- 24 interview questions
- Senior
- [Interview Questions: Django](https://sharpskill.dev/en/technologies/django/interview-questions.md)

## 1. What is Django Channels?

**Answer**

Django Channels is an extension that adds support for asynchronous protocols to Django, enabling WebSockets, HTTP2, and other non-HTTP protocols. It extends Django's synchronous request-response model by using ASGI (Asynchronous Server Gateway Interface) instead of WSGI, enabling real-time features like chat or push notifications.

## 2. What is the main difference between WSGI and ASGI?

**Answer**

WSGI (Web Server Gateway Interface) is synchronous and handles only one request at a time per worker, while ASGI (Asynchronous Server Gateway Interface) supports asynchronous operations and persistent connections like WebSockets. ASGI can handle multiple simultaneous connections without blocking, which is essential for real-time applications.

## 3. What is a Consumer in Django Channels?

**Answer**

A Consumer is the Django Channels equivalent of a Django view for asynchronous connections. It handles the complete lifecycle of a WebSocket connection: connection, message reception, response sending, and disconnection. Consumers can be synchronous (WebsocketConsumer) or asynchronous (AsyncWebsocketConsumer) and allow structuring business logic for each connection type.

## 21 more questions available

- Which Consumer method is called when a WebSocket connection is established?
- What is the scope in Django Channels?

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