AWS Certified Solutions Architect – Associate (SAA-C02) — Question 453

An online photo-sharing company stores its photos in an Amazon S3 bucket that exists in the us-west-1 Region. The company needs to store a copy of all existing and new photos in another geographical location.
Which solution will meet this requirement with the LEAST operational effort?

Answer options

• A. Create a second S3 bucket in us-east-1. Enable S3 Cross-Region Replication from the existing S3 bucket to the second S3 bucket.
• B. Create a cross-origin resource sharing (CORS) configuration of the existing S3 bucket. Specify us-east-1 in the CORS rule's AllowedOrigin element.
• C. Create a second S3 bucket in us-east-1 across multiple Availability Zones. Create an S3 Lifecycle management rule to save photos into the second S3 bucket.
• D. Create a second S3 bucket in us-east-1 to store the replicated photos. Configure S3 event notifications on object creation and update events that invoke an AWS Lambda function to copy photos from the existing S3 bucket to the second S3 bucket.

Correct answer: A

Explanation

Amazon S3 Cross-Region Replication (CRR) is a fully managed, built-in feature that can replicate both existing and new objects to another region with minimal configuration. Using AWS Lambda functions requires custom code development and ongoing maintenance, which increases operational effort. S3 Lifecycle rules and CORS configurations are not designed for copying or replicating objects between buckets across regions.