Crucial Exams

AWS Certified Solutions Architect Professional SAP-C02 Practice Question

An e-commerce company runs three AWS Lambda functions in sequence (ChargePayment ➝ ReserveInventory ➝ GenerateShipment) to process customer orders. Intermittent 5xx errors and timeouts in downstream services occasionally cause the whole workflow to fail.

The operations team needs a more reliable solution that meets these requirements:

  • Automatically retry transient errors with exponential backoff.
  • If a step ultimately fails, record the failure and invoke a CompensateOrder Lambda function, without losing the execution history.
  • Guarantee that each step runs exactly once, even across AWS service disruptions.
  • Minimize custom code and ongoing operational overhead.

Which approach should a solutions architect recommend?

  • Build an AWS Step Functions Standard state machine that invokes each Lambda task. Define Retry with MaxAttempts and BackoffRate for exponential backoff and add a Catch handler that transitions to a CompensateOrder state on failure.

  • Use an AWS Step Functions Express state machine to invoke the three Lambda functions and rely on EventBridge automatic retries for failed executions.

  • Configure AWS Lambda Destinations to send failed invocations to the CompensateOrder function and use Amazon EventBridge rules to trigger additional retries.

  • Add Amazon SQS queues in front of each Lambda function, implement retry logic in the code, and configure dead-letter queues for unprocessed messages.

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