AWS Certified Developer – Associate (DVA-C02) — Question 384

A company used AWS to develop an application for customers. The application includes an Amazon API Gateway API that invokes AWS Lambda functions. The Lambda functions process data and store the data in Amazon DynamoDB tables.

The company must monitor the entire application to identify potential bottlenecks in the architecture that can negatively affect customers.

Which solution will meet this requirement with the LEAST development effort?

Answer options

• A. Instrument the application with AWS X-Ray. Inspect the service map to identify errors and issues.
• B. Configure Lambda exceptions and additional logging to Amazon CloudWatch. Use CloudWatch Logs Insights to query the logs.
• C. Configure API Gateway to log responses to Amazon CloudWatch. Create a metric filter for the TooManyRequestsException error message.
• D. Use Amazon CloudWatch metrics for the DynamoDB tables to identify all the ProvisionedThroughputExceededException error messages.

Correct answer: A

Explanation

AWS X-Ray is designed specifically for tracing and analyzing distributed applications, providing an end-to-end service map that visualizes bottlenecks across API Gateway, Lambda, and DynamoDB with minimal configuration effort. The other options only focus on isolated components of the architecture and would require significant manual effort to correlate logs and metrics to identify the root cause of end-to-end performance issues.