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AWS Certified Solutions Architect - Professional · AWS
Select one answer.
Written by other learners. Comments can disagree with the marked answer — check the official documentation when in doubt.
Why not A?
B is correct because using a primary SQS queue with a DLQ ensures that messages are durably stored and can be retried if the third-party service fails, preventing data loss.
https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-configure-dead-letter-queue.html Amazon SQS does not create the dead-letter queue automatically. You must first create the queue before using it as a dead-letter queue. For instructions on creating a queue to use as a dead letter queue, see Create a queue using the Amazon SQS console.