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AWS Certified Developer – Associate DVA-C02 · Domain 4: Troubleshooting and Optimization

Common Lambda errors: throttling (429), timeouts, AccessDenied from the execution role, malformed proxy responses (502), API Gateway 504 integration timeouts

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Last reviewed September 25, 2026 · Leer en español

Many troubleshooting questions describe a symptom and an error code. Knowing what each common Lambda and API Gateway error means, and its fix, turns these into easy points.

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