SAA-C03 Q72 · Serverless

Question

A company is building a serverless web application that will serve customers globally by using REST API endpoints. The application must minimize latency regardless of the application us-er's geographic location The initial amount of traffic that the application will handle is un-known. What should a solutions architect do to meet these requirements?

Accepted Answer

**Answer A** satisfies every requirement:

1. **Serverless**: API Gateway + Lambda is fully serverless — no servers to manage.

2. **Minimize latency globally**: **Edge-optimized API endpoints** route requests through Amazon CloudFront's global network of edge locations (200+ Points of Presence). When a user in Tokyo makes a request, it enters the AWS network at the nearest CloudFront edge location, traversing Amazon's optimized backbone network to the API Gateway region. This dramatically reduces latency for geographically distributed users.

3. **Unknown initial traffic**: Lambda naturally handles unknown traffic because it scales automatically from zero. **Provisioned concurrency** pre-initializes a set number of execution environments, eliminating cold starts for the baseline traffic.

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