Q100Design Resilient Architectures
A solutions architect is designing an application to help users complete and submit registration forms. The solutions architect intends to use a two-tier architecture consisting of a web application server tier and a worker tier. The application must process submitted forms quickly. It must process every form exactly once. The solution must ensure that no data is lost. Which solution meets these requirements?
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A 3
Answer is A
A 3
Unlike standard queues, FIFO queues don't introduce duplicate messages. FIFO queues help you avoid sending duplicates to a queue. If you retry the SendMessage action within the 5-minute deduplication interval, Amazon SQS doesn't introduce any duplicates into the queue.
https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/FIFO-queues-exactly-once-processing.html
A 3
Keywords in the qsn (quickly and once) = SQS FIFO