Your company is planning to use the Simple Storage Service to store objects that will be accessed by users. There is speculation that there would be roughly 6000 GET requests per second. Which of the following could be used to ensure optimal performance? (Select TWO)

Answer options:

A.Use a CloudFront distribution in front of the S3 bucket.
B.Enable S3 Transfer Acceleration.
C.Enable versioning for the objects.
D.Enable Cross Region Replication for the bucket.

Answer – A and B
Storing your static content with S3 provides a lot of advantages. But to help optimize your application’s performance and security while effectively managing cost, we recommend that you also set up Amazon CloudFront to work with your S3 bucket to serve and protect the content. CloudFront is a content delivery network (CDN) service that delivers static and dynamic web content, video streams, and APIs around the world, securely and at scale.
S3 Transfer Acceleration improves transfer performance by routing uploads and downloads through Amazon CloudFront’s globally distributed Edge Locations and over AWS backbone networks, and by using network protocol optimizations.
Option C is incorrect as it can only be used to prevent the accidental deletion of objects.
Option D is incorrect as S3 Cross-region replication can be used to improve latency (across regions) as well as disaster recovery. The question does not give any region-specific details or any need for bucket migration or high availability of bucket and therefore it is an inappropriate option.
Reference:
https://aws.amazon.com/blogs/networking-and-content-delivery/amazon-s3-amazon-cloudfront-a-match-made-in-the-cloud/
https://aws.amazon.com/s3/transfer-acceleration/