A company needs to develop a proof of concept for a web service application.

Requirement Summary:

Simple REST endpointforweather data

Light backend usage (POC, testing)

Wantscachingsupport to reduce backend calls

Must becost-effective

Evaluate Options:

✅B: Lambda + API Gateway + SAM

✅Serverless = No idle costs

✅API Gateway canenable caching(response caching at endpoint level)

✅SAM makes deployment simple and repeatable

✅Perfect for low-traffic testing

A: EKS + API Gateway

❌High overhead

Not cost-effective for POC/testing

C: ECS + API Gateway

❌Similar to A: Container orchestration not needed for light REST endpoint

D: Elastic Beanstalk + ALB + Lambda

❌Overly complex and does not directly expose Lambda

Beanstalk better suited for full apps, not small REST functions

AWS SAM:https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/what-is-sam.html

API Gateway caching:https://docs.aws.amazon.com/apigateway/latest/developerguide/api-gateway-caching.html

Serverless Best Practices:https://docs.aws.amazon.com/lambda/latest/dg/best-practices.html