Which AWS service provides frontend web and mobile developers with tools to build full-stack applications on AWS?

• A. AWS Amplify
• B. AWS IoT Core
• C. Amazon API Gateway
• D. AWS Device Farm

Answer: (A)

This question focuses on a service that bundles frontend tooling for building full-stack applications on AWS. AWS Amplify is designed for frontend web and mobile developers, offering a cohesive set of tools to build, connect, deploy, and host full-stack apps. It provides the Amplify CLI to provision backend resources such as authentication (Cognito), APIs (GraphQL via AppSync or REST via API Gateway), and storage (S3, DynamoDB), along with Lambda functions. Amplify Libraries let your frontend apps interact with these services, and Amplify Hosting delivers hosting with CI/CD for web apps. In essence, it provides both the frontend and the connected backend in one streamlined workflow, which is precisely what “full-stack applications on AWS” implies. The other services have different roles: IoT Core handles device messaging for the Internet of Things, API Gateway exposes APIs but doesn’t provide end-to-end frontend tooling, and Device Farm is for testing apps on real devices. So Amplify is the best fit.