An e-commerce application processes orders asynchronously. The order processing system must ensure that every order is processed exactly once and in the exact order it was received.<br/><br/>Which AWS service should be used to decouple the application?

Answer options:

Amazon SQS standard queue

Amazon SQS FIFO queue

Amazon SNS

Amazon Kinesis Data Streams

How to approach this question

Look for the keywords 'exactly once' and 'exact order'.

Full Answer

B.Amazon SQS FIFO queue✓ Correct

Amazon SQS FIFO queue

Amazon SQS FIFO (First-In-First-Out) queues are designed to guarantee that messages are processed exactly once, in the exact order that they are sent.

Common mistakes

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

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