A developer creates an AWS Lambda function that is written in Java. During testing, the Lambda function does not work how the developer expected. The developer wants to use tracing capabilities to…

AWS Trusted Advisor provides best-practice recommendations for cost, security, and performance at the account level but does not capture function-level execution traces or runtime debugging information.

Amazon CloudWatch provides logs and metrics for Lambda (such as duration and error counts) but does not offer the detailed distributed tracing and request-level visualization that X-Ray provides for debugging logic issues.

AWS X-Ray integrates directly with AWS Lambda to capture trace data including invocation timing, subsegment details, and downstream service calls. Enabling active tracing on the Lambda function allows the developer to visualize the full execution path and pinpoint where the function behaves unexpectedly.

AWS CloudTrail records API calls made to AWS services for auditing and compliance purposes but does not trace application-level execution or capture what happens inside a Lambda function during invocation.