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SAA-C03 · Question #284

A company wants to enhance its ecommerce order-processing application that is deployed on AWS. The application must process each order exactly once without affecting the customer experience during unp

The correct answer is A. Create an Amazon Simple Queue Service (Amazon SQS) FIFO queue. Put all the orders in the. Amazon SQS FIFO queues guarantee the order of message delivery and ensure that each message is delivered exactly once. Paired with AWS Lambda, this creates a scalable, fault- tolerant architecture that processes each order in order and prevents duplicates, which is critical for e

Submitted by wei.xz· Mar 4, 2026Design Resilient Architectures

Question

A company wants to enhance its ecommerce order-processing application that is deployed on AWS. The application must process each order exactly once without affecting the customer experience during unpredictable traffic surges. Which solution will meet these requirements?

Options

  • ACreate an Amazon Simple Queue Service (Amazon SQS) FIFO queue. Put all the orders in the
  • BCreate an Amazon Simple Notification Service (Amazon SNS) standard topic. Publish all the
  • CCreate a flow by using Amazon AppFlow. Send the orders to the flow. Configure an AWS Lambda
  • DConfigure AWS X-Ray in the application to track the order requests. Configure the application to

How the community answered

(29 responses)
  • A
    83% (24)
  • B
    3% (1)
  • C
    3% (1)
  • D
    10% (3)

Explanation

Amazon SQS FIFO queues guarantee the order of message delivery and ensure that each message is delivered exactly once. Paired with AWS Lambda, this creates a scalable, fault- tolerant architecture that processes each order in order and prevents duplicates, which is critical for ecommerce workflows.

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