[Solved] You want to build a system where an SNS topic sends messages to three SQS queues.... How should you configure the system to ensure reliable processing and no message loss? | AWS

AWS - SNS and SQS

You want to build a system where an SNS topic sends messages to three SQS queues. One queue processes orders, another sends notifications, and the third logs events. How should you configure the system to ensure reliable processing and no message loss?

ASubscribe only the order queue to SNS and forward messages to others manually

BSend messages directly to each SQS queue without SNS

CUse one SQS queue for all processing and filter messages inside the consumer

DSubscribe all three SQS queues to the SNS topic, enable dead-letter queues for each, and set appropriate message retention

Step-by-Step Solution

Solution:

Step 1: Use SNS fan-out to send messages to all queues
Subscribing all three SQS queues to the SNS topic ensures each gets the message.
Step 2: Enable dead-letter queues and set retention
Dead-letter queues catch failed messages; retention ensures messages stay until processed.
Final Answer:
Subscribe all three SQS queues to the SNS topic, enable dead-letter queues for each, and set appropriate message retention -> Option D
Quick Check:
Fan-out + DLQ + retention = reliable, no message loss [OK]

Quick Trick: Use fan-out with DLQ and retention for reliability [OK]

Common Mistakes:

Skipping dead-letter queues causing message loss
Using one queue for all processing causing bottlenecks
Not subscribing all queues to SNS topic

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How should you configure the system to ensure reliable processing and no message loss?

Step 1: Use SNS fan-out to send messages to all queues

Step 2: Enable dead-letter queues and set retention

Final Answer:

Quick Check:

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