ASGI vs WSGI in Django - Practice Questions

Challenge - 5 Problems

🧠 Conceptual

intermediate

What is the main difference between ASGI and WSGI?

Choose the option that best describes the key difference between ASGI and WSGI in Django applications.

A ASGI and WSGI both support asynchronous communication but differ in performance optimizations.

B WSGI supports asynchronous communication and WebSockets, while ASGI only supports synchronous HTTP requests.

C ASGI supports asynchronous communication and WebSockets, while WSGI only supports synchronous HTTP requests.

D WSGI is designed for mobile apps, while ASGI is designed only for desktop web apps.

💡 Hint

Think about which interface allows handling multiple connections at the same time.

ASGI (Asynchronous Server Gateway Interface) supports asynchronous features like WebSockets and long-lived connections. WSGI (Web Server Gateway Interface) only handles synchronous HTTP requests.

❓ component_behavior

intermediate

What happens when a Django app using WSGI tries to handle a WebSocket connection?

Select the correct behavior of a Django app configured with WSGI when it receives a WebSocket request.

A The app will reject the connection because WSGI does not support WebSockets.

B The app will handle the WebSocket connection normally using synchronous code.

C The app will convert the WebSocket to a regular HTTP request automatically.

D The app will crash with a syntax error.

💡 Hint

WSGI was designed before WebSockets existed.

WSGI does not support WebSocket connections, so the app will reject or fail to handle them.

📝 Syntax

advanced

Identify the correct ASGI application declaration in Django

Which of the following code snippets correctly declares an ASGI application in Django?

Django

from django.core.asgi import get_asgi_application

application = ???

A application.asgi()

B get_wsgi_application()

C asgi_application()

D get_asgi_application()

💡 Hint

Look for the function that returns an ASGI application instance.

The correct way to get an ASGI application in Django is to call get_asgi_application(). The other options are either WSGI or invalid.

❓ state_output

advanced

What is the output when running an async Django view under WSGI?

Consider an async Django view that returns a simple HTTP response. What happens when this view is run under a WSGI server?

Django

async def my_view(request):
    return HttpResponse('Hello async!')

A Raises a RuntimeWarning and runs the view synchronously, returning 'Hello async!'.

B The server crashes with an AttributeError.

C Raises a SyntaxError because async views are not allowed.

D Runs asynchronously and returns 'Hello async!' without warnings.

💡 Hint

WSGI servers expect synchronous views that return HttpResponse objects directly; async views return coroutines.

Under WSGI, an async view returns a coroutine object instead of an HttpResponse. Django raises an AttributeError (e.g., 'coroutine' object has no attribute 'status_code'). The view body does not execute.

❓ lifecycle

expert

How does ASGI handle multiple simultaneous connections compared to WSGI?

Select the option that best explains how ASGI manages multiple connections differently from WSGI in Django applications.

A ASGI uses an event loop to handle many connections concurrently without blocking, while WSGI handles one request at a time per worker.

B WSGI uses an event loop to handle many connections concurrently, while ASGI processes requests sequentially.

C Both ASGI and WSGI use threading to handle multiple connections simultaneously.

D ASGI queues all requests and processes them one by one, while WSGI uses multiprocessing.

💡 Hint

Think about asynchronous programming and event loops.

ASGI uses asynchronous event loops to handle many connections at once without blocking. WSGI processes one request per worker synchronously.