AWS Certified SysOps Administrator Practice Exam

How can you analyze 501 errors occurring in a website hosted on S3 and served via CloudFront?

1. Review the CloudFront distribution settings

2. Check CloudFront access logs using Athena

3. Inspect the S3 bucket policies for issues

4. Reconfigure the CloudFront cache behavior

The correct answer is: Check CloudFront access logs using Athena

Analyzing 501 errors, which indicate that the server does not support the functionality required to fulfill the request, can be effectively achieved by checking CloudFront access logs using Athena. This is because the access logs provide detailed information about requests made to your CloudFront distribution, including the HTTP status codes returned to clients. Using Athena, you can query these logs to filter for the specific 501 errors. This allows you to identify patterns, such as which URL paths return 501 errors, the origins of the requests, and the associated user agents, giving you a clearer view of the context in which these errors occur. This data-driven approach helps in debugging issues effectively and making informed decisions on how to rectify them. Other methods, while potentially useful in understanding aspects of the deployment, do not directly provide insight specific to analyzing the occurrence of the error itself. The CloudFront distribution settings, for instance, would give you a broad overview of how the distribution is configured but may not directly point to the cause of 501 errors. Similarly, inspecting S3 bucket policies might reveal permission issues, but it is less likely to directly relate to 501 errors. Lastly, reconfiguring the CloudFront cache behavior could influence performance but without direct insights from the logs, it