AWS Certified SysOps Administrator – Associate (legacy) — Question 631

A SysOps Administrator noticed that the cache hit ratio for an Amazon CloudFront distribution is less than 10%.
Which collection of configuration changes will increase the cache hit ratio for the distribution? (Choose two.)

Answer options

• A. Ensure that only required cookies, query strings, and headers are forwarded in the Cache Behavior Settings
• B. Change the Viewer Protocol Policy to use HTTPS only
• C. Configure the distribution to use presigned cookies and URLs to restrict access to the distribution
• D. Enable automatic compression of objects in the Cache Behavior Settings
• E. Increase the CloudFront time to live (TTL) settings in the Cache Behavior Settings

Correct answer: A, E

Explanation

To improve the CloudFront cache hit ratio, you should minimize the unique variations of requests that reach the origin by forwarding only the essential cookies, query strings, and headers, and increase the time to live (TTL) settings so objects remain cached for longer periods. Options B, C, and D are incorrect because changing the protocol to HTTPS, restricting access with presigned cookies/URLs, and enabling object compression do not increase the likelihood of serving cached content.