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AWS SAA-C03 · Question 35 · Domain 2.3: Decoupling Mechanisms
A company has a microservices architecture. When a new user registers, an event must be sent to three separate microservices: Welcome Email, Analytics, and Provisioning. Each service must process the event independently at its own pace. Which TWO services should be combined to implement this 'fan-out' pattern? (Select TWO.)
A company has a microservices architecture. When a new user registers, an event must be sent to three separate microservices: Welcome Email, Analytics, and Provisioning. Each service must process the event independently at its own pace. Which TWO services should be combined to implement this 'fan-out' pattern? (Select TWO.)
Answer options:
A.
Amazon SNS
B.
Amazon SQS
C.
Amazon Kinesis Data Firehose
D.
AWS Step Functions
E.
Amazon MQ
How to approach this question
The 'fan-out' pattern in AWS is classically implemented using SNS to publish to multiple SQS queues.
Full Answer
Amazon SNS and Amazon SQS.
The 'fan-out' scenario is a common architectural pattern where an Amazon SNS topic publishes a message to multiple Amazon SQS queues in parallel. This allows each microservice to process the event independently and at its own pace.
Common mistakes
Using only SNS (subscribers might miss messages if offline) or only SQS (cannot natively duplicate messages to multiple queues).
Practice the full AWS SAA-C03 Practice Exam 3
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