GregLab | Exam Prep

Networking and Content Delivery

AWS AppSync

AWS AppSync provides managed GraphQL APIs and real-time data synchronization. It can aggregate GenAI job state, conversation metadata, and enterprise data behind one typed client contract.

Key points

  • Resolvers connect schema fields to supported data sources or functions
  • Subscriptions push selected mutations to connected clients
  • Authorization modes can be combined with field-level design

When to use it

  • Stream generation-job status changes to a web client
  • Expose a typed assistant workspace over DynamoDB and Lambda data sources

Exam tips

  • Choose AppSync when GraphQL and subscriptions fit client needs; API Gateway is broader for REST and HTTP APIs
  • A GraphQL schema limits shape, not business authorization, so enforce ownership in resolvers

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