Crucial Exams

AWS Certified Solutions Architect Professional SAP-C02 Practice Question

Your fintech company runs an event-driven architecture on AWS. The Order service publishes every incoming order to an Amazon SNS FIFO topic named Orders.fifo. Several microservices-each subscribed through either an Amazon SQS FIFO queue or an AWS Lambda function-process these order events in parallel. During a recent incident one subscriber was down for 6 hours and could not easily retrieve the missed events after it came back online. The reliability team has issued the following additional requirements:

  • Each subscriber must be able to re-deliver (replay) up to the last 24 hours of order events on demand without help from the publisher.
  • Strict ordering and exactly-once message delivery must be preserved.
  • The solution must be fully managed and require only minimal configuration changes (no code changes) to existing publishers or consumers.

Which action will most effectively meet these requirements?

  • Subscribe an Amazon Kinesis Data Streams stream to the SNS topic and enable extended data retention; have subscribers read from the stream starting at a chosen sequence number when a replay is required.

  • Add an Amazon SQS Standard queue with a 24-hour retention period as an additional subscriber and configure consumers to redrive messages from the queue's dead-letter queue after an outage.

  • Enable message archiving on the existing SNS FIFO topic with a 24-hour retention period, and allow subscribers to start a replay by setting the ReplayPolicy attribute when they need to recover.

  • Turn on AWS CloudTrail data events for the SNS topic and use AWS Glue to extract the Publish API calls from the CloudTrail logs in Amazon S3; republish the messages when a subscriber requests a replay.

AWS Certified Solutions Architect Professional SAP-C02
Design for New Solutions
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