SAA-C03 Question #232: Real Exam Question with Answer & Explanation

Question

A company has a serverless web application that is comprised of AWS Lambda functions. The application experiences spikes in traffic that cause increased latency because of cold starts. The company wants to improve the application's ability to handle traffic spikes and to minimize latency. The solution must optimize costs during periods when traffic is low. Which solution will meet these requirements?

Options

• AConfigure provisioned concurrency for the Lambda functions. Use AWS Application Auto Scaling
• BLaunch Amazon EC2 instances in an Auto Scaling group. Add a scheduled scaling policy to
• CConfigure provisioned concurrency for the Lambda functions. Set a fixed concurrency level to
• DCreate a recurring schedule in Amazon EventBridge Scheduler. Use the schedule to invoke the

Explanation

Provisioned Concurrency: AWS Lambda's provisioned concurrency ensures that a predefined number of execution environments are pre-warmed and ready to handle requests, reducing latency during traffic spikes. This solution optimizes costs during low-traffic periods when combined with AWS Application Auto Scaling to dynamically adjust the provisioned concurrency based ondemand. Incorrect Options Analysis: Option B: Switching to EC2 would increase complexity and cost for a serverless application. Option C: A fixed concurrency level may result in over-provisioning during low-traffic periods, leading to higher costs. Option D: Periodically warming functions does not effectively handle sudden spikes in traffic.

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