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AWS SAA-C03 · Question 32 · Domain 2.3: Decoupling Mechanisms
A company wants to build an event-driven architecture. When a new file is uploaded to Amazon S3, an event should trigger two independent processing workflows simultaneously. One workflow updates a database, and the other generates a thumbnail. Which TWO services should be combined to achieve this decoupled architecture? (Select TWO.)
A company wants to build an event-driven architecture. When a new file is uploaded to Amazon S3, an event should trigger two independent processing workflows simultaneously. One workflow updates a database, and the other generates a thumbnail. Which TWO services should be combined to achieve this decoupled architecture? (Select TWO.)
Answer options:
A.
Amazon SNS
B.
Amazon Kinesis Data Firehose
C.
Amazon SQS
D.
AWS Step Functions
E.
Amazon MQ
How to approach this question
Look for the 'Fanout' pattern: SNS pushes to multiple SQS queues.
Full Answer
A,C
This scenario describes the 'Fanout' pattern. Amazon S3 sends an event to an Amazon SNS topic. The SNS topic has multiple Amazon SQS queues subscribed to it. SNS pushes the message to all subscribed queues simultaneously, allowing independent microservices to process the event at their own pace.
Common mistakes
Choosing Step Functions. While Step Functions has a Parallel state, SNS+SQS is the standard decoupling mechanism for independent asynchronous event fanout.
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