A financial application requires that transaction messages are processed exactly once and in the exact order they were received. Which TWO AWS services or features must be used to meet this requirement? (Select TWO.)

Answer options:

Amazon SQS Standard queue

Amazon SQS FIFO queue

Amazon SNS

Message Deduplication ID

Visibility Timeout

How to approach this question

Look for 'exactly once' and 'exact order'. This strictly requires SQS FIFO queues and deduplication.

Full Answer

SQS FIFO (First-In-First-Out) queues are designed to enhance messaging between applications when the order of operations and events is critical. They use Message Deduplication IDs to provide exactly-once processing.

Common mistakes

Selecting Standard queues, which can deliver messages out of order or more than once.

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