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SAA-C03 · Question #756

A solutions architect needs to design a solution to process incoming work items. The work items need to be processed as soon as the work items arrive. Processing can take up to 30 minutes to finish…

The correct answer is B. Invoke an AWS Step Functions workflow to process incoming work items. Use AWS Lambda E. Set up an Amazon API Gateway REST API to receive work items. Send the work items to an. Using API Gateway with SQS decouples incoming requests from processing, allowing the system to scale automatically with varying work item rates. AWS Step Functions can orchestrate long- running workflows (up to 1 year) and maintain state across multiple steps, including…

Submitted by suresh_in· Mar 4, 2026Design High-Performing Architectures

Question

A solutions architect needs to design a solution to process incoming work items. The work items need to be processed as soon as the work items arrive. Processing can take up to 30 minutes to finish. Processing involves calling external APIs, passing the work items through several intermediate steps and states, and storing those states for future reference. The solution must scale to meet varying incoming work item rates throughout the day. Which combination of steps meets these requirements with the LEAST operational overhead? (Choose two.)

Options

  • AInvoke an AWS Lambda function for each incoming work item. Configure each Lambda function
  • BInvoke an AWS Step Functions workflow to process incoming work items. Use AWS Lambda
  • CSet up an Amazon API Gateway REST API to receive work items. Configure the REST API to
  • DDeploy two Amazon EC2 Reserved instances behind an Application Load Balancer to handle
  • ESet up an Amazon API Gateway REST API to receive work items. Send the work items to an

How the community answered

(44 responses)
  • A
    5% (2)
  • B
    59% (26)
  • C
    11% (5)
  • D
    25% (11)

Explanation

Using API Gateway with SQS decouples incoming requests from processing, allowing the system to scale automatically with varying work item rates. AWS Step Functions can orchestrate long- running workflows (up to 1 year) and maintain state across multiple steps, including external API calls, minimizing operational overhead compared with managing EC2 instances or manually handling Lambda state.

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