LLD - Design — Food Delivery System
You need to design a notification system that sends alerts to all parties and retries failed deliveries up to 3 times. Which design approach is best?
You need to design a notification system that sends alerts to all parties and retries failed deliveries up to 3 times. Which design approach is best?
hard📝 Trade-off Q8 of Q15
Step-by-Step Solution
Solution:
Step 1: Understand retry requirements
Retries require tracking delivery attempts and handling failures gracefully.Step 2: Choose a design that supports retries and failure handling
A message queue with retry logic and a dead-letter queue allows retries and isolates failed messages.Final Answer:
Use a message queue with retry logic and dead-letter queue for failures -> Option CQuick Check:
Retries need queues and failure handling [OK]
Quick Trick: Use queues with retry and dead-letter for reliability [OK]
Common Mistakes:
MISTAKES- Ignoring retries
- Synchronous sends only
- No failure handling
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