AWS Certified Solutions Architect - Associate SAA-C03 — Topic 1 Question 785

Question

A solutions architect is designing a payment processing application that runs on AWS Lambda in private subnets across multiple Availability Zones. The application uses multiple Lambda functions and processes millions of transactions each day. The architecture must ensure that the application does not process duplicate payments. Which solution will meet these requirements?

Accepted Answer

Correct answer: C. The correct answer is C. Option C: Use Lambda to retrieve all due payments. Publish the due payments to an Amazon Simple Queue Service (Amazon SQS) FIFO queue. Configure another Lambda function to poll the FIFO queue and to process the due payments. AWS Lambda runs code without provisioning servers and scales automatically, which minimizes operational overhead. Amazon SQS is a fully managed message queue that decouples components and absorbs traffic spikes. AWS Config tracks resource configuration changes and evaluates compliance. By spanning multiple Availability Zones / adding redundancy, this option provides the high availability and resilience required.

AWS Certified Solutions Architect - Associate SAA-C03 — Question 785