AppSync is a managed service for building GraphQL APIs. It connects apps to data sources like DynamoDB, Lambda, and RDS, and supports real-time updates and offline sync for mobile and web apps.
The tell
Whenever a scenario mentions GraphQL, or real-time data sync across mobile/web clients, that’s AppSync. It’s distinct from API Gateway (REST/HTTP/WebSocket APIs). GraphQL → AppSync; REST → API Gateway.
Test yourself
A mobile app team wants a managed GraphQL API with real-time data synchronization and offline support. Which service?
- Amazon API Gateway
- AWS AppSync
- Application Load Balancer
- Amazon CloudFront
👉 Click to reveal the answer & explanation
Correct answer: B. AppSync is the managed GraphQL service with real-time and offline sync. API Gateway (A) is for REST/HTTP/WebSocket APIs, not GraphQL; an ALB (C) and CloudFront (D) don’t provide GraphQL APIs.
Related topics
API Gateway · Amazon DynamoDB · AWS Lambda
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