SOA-C03 Cloudfront Practice Questions

A company hosts a static website in an Amazon S3 bucket, accessed globally via Amazon CloudFront. The Cache-Control max-age header is set to 1 hour, and Maximum TTL is set to 5 minutes. The CloudOps engineer observes that CloudFront is not caching objects for the expected duration. What is the reason for this issue?

• AA. The Expires header has been set to 3 hours.
• BB. Cached assets are not expiring in the edge location.
• CC. Cache invalidation is missing in the CloudFront configuration.
• DD. Cache-duration settings conflict with each other.

A company is performing deployments of an application at regular intervals. Users report that the application sometimes does not work properly. The company discovers that some users' browsers are fetching previous versions of the JavaScript files. The application runs on Amazon EC2 instances behind an Application Load Balancer (ALB). The ALB is the origin for an Amazon CloudFront distribution. A SysOps administrator must implement a solution to ensure that CloudFront serves the latest version of the JavaScript files. The solution must not affect application server performance. Which solution will meet these requirements?

• AA. Reduce the maximum TTL and default TTL of the CloudFront distribution behavior to 0.
• BB. Add a final step in the deployment process to invalidate all files in the CloudFront distribution.
• CC. Add a final step in the deployment process to invalidate only the changed JavaScript files in the CloudFront distribution.
• DD. Remove CloudFront from the path of serving JavaScript file
• EE. Serve the JavaScript files directly through the ALB.