SAP-C02 Q301 · Serverless

Question

A company is building an application that will run on an AWS Lambda function. Hundreds of customers will use the application. The company wants to give each customer a quota of requests for a specific time period. The quotas must match customer usage patterns. Some customers must receive a higher quota for a shorter time period. Which solution will meet these requirements?

Accepted Answer

**Option A: API Gateway REST API + Usage Plans + API Keys**

1. **Per-customer quota requirement**: API Gateway **usage plans** are specifically designed to set quotas (number of requests per day/week/month) on a per-customer basis. Each customer gets their own usage plan with a custom quota configuration.

2. **Flexible time periods**: Usage plans allow you to configure quotas with different periods (daily, weekly, monthly). Some customers can get a higher quota for a shorter period (e.g., 10,000/day) while others get a lower quota for a longer period (e.g., 50,000/month). This directly addresses the requirement that 'quotas must match customer usage patterns.'

3. **API keys for identification**: Each user under a customer gets an API key associated with the customer's usage plan. API Ga

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