[Solved] You are building a Django app with Redis as a message broker to deliver real-time notifications to multiple users subscribed to different... Which design best supports scalable, multi-user delivery? | Django

Django - Celery and Background Tasks

You are building a Django app with Redis as a message broker to deliver real-time notifications to multiple users subscribed to different channels. Which design best supports scalable, multi-user delivery?

AUse Redis as a cache only and send notifications via email

BStore notifications in Redis lists and poll them periodically from the client

CSend notifications directly from Django views without using Redis

DUse Redis Pub/Sub with separate channels per user and a WebSocket consumer subscribing to each user's channel

Step-by-Step Solution

Solution:

Step 1: Understand Redis Pub/Sub
Redis Pub/Sub supports multiple channels and subscribers efficiently.
Step 2: Match design to real-time multi-user needs
Using separate channels per user with WebSocket consumers allows targeted, real-time delivery.
Step 3: Evaluate other options
Polling is inefficient; direct sends lack scalability; email is not real-time.
Final Answer:
Use Redis Pub/Sub with separate channels per user and a WebSocket consumer subscribing to each user's channel -> Option D
Quick Check:
Pub/Sub with WebSockets enables scalable real-time notifications [OK]

Quick Trick: Use Redis Pub/Sub with WebSockets for real-time multi-user notifications [OK]

Common Mistakes:

MISTAKES

Using polling instead of push notifications
Ignoring WebSocket integration for real-time updates
Sending notifications without message broker
Confusing caching with messaging

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More Django Quizzes

Which design best supports scalable, multi-user delivery?

Step 1: Understand Redis Pub/Sub

Step 2: Match design to real-time multi-user needs

Step 3: Evaluate other options

Final Answer:

Quick Check:

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