A company is building an order processing system. Messages must be processed exactly once and in the exact order they were received. Which AWS service should be used?

Answer options:

Amazon SQS Standard queue

Amazon SQS FIFO queue

Amazon SNS

Amazon Kinesis Data Firehose

How to approach this question

Match 'exactly once' and 'exact order' to the queue type.

Full Answer

B.Amazon SQS FIFO queue✓ Correct

Amazon SQS FIFO queue

Amazon SQS FIFO (First-In-First-Out) queues are designed to enhance messaging between applications when the order of operations and events is critical, or where duplicates can't be tolerated.

Common mistakes

Choosing Standard SQS, which allows duplicates and out-of-order delivery.

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Practice the full AWS SAA-C03 Practice Exam 2

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