SAA-C03 Q657 · Serverless

Question

An insurance company wants to migrate an application that calculates insurance premiums to AWS. The company must run calculations immediately when a customer submits information through the application.The application usually takes 10 seconds to process a calculation. Which solution will meet this requirement?

Accepted Answer

**Option A: API Gateway HTTP API + Lambda** satisfies every requirement:

1. **Immediate processing**: API Gateway provides a synchronous HTTP endpoint. When a customer submits data, the request hits API Gateway, which immediately invokes a Lambda function. The customer gets the result back in real-time — no queuing, no scheduling.

2. **10-second processing time**: Lambda supports up to **15 minutes** of execution time. A 10-second calculation is well within Lambda's limits. This is a lightweight, short-lived computation — exactly Lambda's sweet spot.

3. **Request-response pattern**: The customer submits information and expects a result back. API Gateway + Lambda provides a classic synchronous request-response pattern. The HTTP API returns the Lambda function's output directly to the cal

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