An order processing workflow uses Amazon SQS as the decoupling layer between a producer and a consumer Lambda function. The consumer intermittently fails due to a downstream dependency. The team has observed that certain “poison” messages keep being retried repeatedly and prevent other messages from being processed efficiently. Which SQS configuration most directly addresses this issue?

Set the SQS queue’s retention period to 10 years and rely on application retries to eventually succeed.

Retention affects how long messages remain available, but it doesn’t isolate repeatedly failing messages.

Increase visibility timeout to a very large value and avoid dead-letter queues to keep ordering stable.

Long visibility time can delay failures, but it does not provide dead-letter isolation for poison messages.

Switch the queue to FIFO and remove retries in the Lambda event source mapping entirely.

FIFO and disabling retries do not reliably solve poison message isolation without DLQ-based redriving.

What does this SAA-C03 question test?

Static NAT maps one inside address to one outside address.

What is the correct answer to this question?

The correct answer is: Configure a redrive policy with a dead-letter queue (DLQ) and set an appropriate visibility timeout greater than the maximum processing time. — Poison messages typically cause repeated processing attempts because they keep failing before a durable recovery path exists. SQS redrive policies with a dead-letter queue (DLQ) solve this by moving messages after they exceed a defined receive count. That prevents one bad payload from consuming processing capacity indefinitely. Additionally, setting the visibility timeout appropriately (longer than the maximum successful processing time) ensures messages aren’t prematurely returned to the queue and retried in a tight loop. Why others are wrong: Extending retention (A) doesn’t isolate failures; it just keeps failing messages around longer. Option B may reduce retry frequency temporarily, but it still keeps poison messages from being quarantined and addressed separately. Option D may change ordering and retry behavior, but without DLQ redriving it lacks the direct mechanism to isolate poison messages after repeated failures.

What should I do if I get this SAA-C03 question wrong?

Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.