AWS Certified Solutions Architect Associate SAA-C03 Practice Question
Your client's online retail system is being redesigned to enhance scalability and ensure that the inventory tracking component can sequentially process transactions as they occur. To prevent any loss or misordering of transaction data, which service should be implemented?
Utilize a workflow orchestration service to manage the application's tasks
Deploy a serverless function with an event processing trigger
Implement a publish/subscribe service for event notifications
Use a managed message queuing service with FIFO capabilities
The correct service for ensuring ordered message processing and reliable delivery between decoupled components is a managed message queuing service that offers FIFO capabilities. FIFO queues ensure that messages are processed in the exact order they are received, which is crucial for maintaining accurate inventory counts. A publish/subscribe service would not provide the required ordering guarantees for this scenario. Workflow orchestration services offer task coordination but do not inherently queue messages. A serverless compute service running code in response to events is not a messaging queue system and does not guarantee message ordering.
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