AWS API Gateway Explained for the DVA-C02 Exam | Developer Associate 2025
Master AWS API Gateway for the AWS Certified Developer Associate exam (DVA-C02) — mapped directly to all 4 official exam domains so you know exactly what to study and why.
API Gateway appears in nearly every serverless, security, and deployment question on the DVA-C02. This video covers every concept you need — from API types and integration modes to authorizers, stages, stage variables, error codes, and observability.
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📌 WHAT'S COVERED
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00:00 Why API Gateway Matters
00:31 Choosing API Types
01:49 Integration Types Explained
02:56 Authorization Options
04:47 Stages And Variables
05:54 Canary Deployments
06:18 Errors Throttling Caching
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🎯 KEY EXAM TOPICS IN THIS VIDEO
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✅ REST API vs HTTP API vs WebSocket API — when to use each
✅ Lambda Proxy integration and the 502 Bad Gateway error
✅ Mapping templates and request/response transformation
✅ Mock integration for development environments
✅ IAM authorization with SigV4 signing
✅ Lambda TOKEN vs REQUEST authorizers with TTL caching
✅ Amazon Cognito User Pool authorizer
✅ API keys and usage plans (metering, NOT security)
✅ API Gateway stages as deployment environments
✅ Stage variables to map to Lambda aliases
✅ Canary deployment traffic shifting and promotion
✅ 504 Gateway Timeout — the 29-second hard limit
✅ Throttling: account → stage → method → usage plan hierarchy
✅ Response caching per stage with TTL and cache invalidation
✅ CloudWatch execution logging and X-Ray distributed tracing
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🔗 RESOURCES
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📄 Official DVA-C02 Exam Guide → https://aws.amazon.com/certification/...
📄 API Gateway Developer Docs → https://docs.aws.amazon.com/apigateway/
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⏱ EXAM FAST FACTS
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Exam code: DVA-C02
Passing score: 720 / 1000
65 questions (50 scored + 15 unscored)
Domain 1 – Development with AWS Services: 32%
Domain 2 – Security: 26%
Domain 3 – Deployment: 24%
Domain 4 – Troubleshooting & Optimization: 18%
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