ExpertEasy1 markMultiple Choice
AWS SAA-C03 · Question 21 · Domain 2.3: Decoupling
A company is building an order processing system. Orders are placed by users via a web interface and sent to a backend processing tier. It is critical that orders are processed exactly once and in the exact order they were received. <br/><br/>Which AWS service should the solutions architect use to decouple the web tier from the processing tier?
A company is building an order processing system. Orders are placed by users via a web interface and sent to a backend processing tier. It is critical that orders are processed exactly once and in the exact order they were received. <br/><br/>Which AWS service should the solutions architect use to decouple the web tier from the processing tier?
Answer options:
A.
Amazon SQS Standard queue
B.
Amazon SQS FIFO queue
C.
Amazon SNS
D.
Amazon Kinesis Data Streams
How to approach this question
Look for the keywords 'exactly once' and 'exact order'. This always points to SQS FIFO.
Full Answer
B.Amazon SQS FIFO queue✓ Correct
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. They provide exactly-once processing and strict ordering.
Common mistakes
Choosing SQS Standard, which does not guarantee order or exactly-once delivery.
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