AWS Certified Developer - Associate
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A developer encounters a timeout issue with Amazon API Gateway while testing a web application, even though the associated AWS Lambda function completes execution within the allowed time. Which CloudWatch metrics should be reviewed to diagnose the problem?
Explanation:
The correct answers are B (IntegrationLatency) and D (Latency). These metrics can help the developer identify the source of the timeout issue. 'IntegrationLatency' measures the response time between the API Gateway and the backend Lambda function. 'Latency' measures the overall response time from the client’s perspective, including the time the API Gateway takes to process and respond to requests. By analyzing these metrics in Amazon CloudWatch, the developer can determine where the delays are occurring and resolve the timeout issue.