AWS Certified Solutions Architect – Associate (SAA-C02) — Question 766

A company has two AWS accounts in the same AWS Region. One account is a publisher account, and the other account is a subscriber account. Each account has its own Amazon S3 bucket.
An application puts media objects into the publisher account's S3 bucket. The objects are encrypted with server-side encryption with customer-provided encryption keys (SSE-C). The company needs a solution that will automatically copy the objects to the subscriber's account's S3 bucket.
Which solution will meet these requirements with the LEAST operational overhead?

Answer options

• A. Enable S3 Versioning on the publisher account's S3 bucket. Configure S3 Same-Region Replication of the objects to the subscriber account's S3 bucket.
• B. Create an AWS Lambda function that is invoked when objects are published in the publisher account's S3 bucket. Configure the Lambda function to copy the objects to the subscriber account's S3 bucket.
• C. Configure Amazon EventBridge (Amazon CloudWatch Events) to invoke an AWS Lambda function when objects are published in the publisher account's S3 bucket. Configure the Lambda function to copy the objects to the subscriber account's S3 bucket.
• D. Configure Amazon EventBridge (Amazon CloudWatch Events) to publish Amazon Simple Notification Service (Amazon SNS) notifications when objects are published in the publisher account's S3 bucket. When notifications are received, use the S3 console to copy the objects to the subscriber account's S3 bucket.

Correct answer: A

Explanation

S3 Same-Region Replication (SRR) is a fully managed feature that automatically replicates objects, including those encrypted with SSE-C, between buckets with minimal operational overhead. Options B and C require writing, maintaining, and scaling custom AWS Lambda code, which introduces unnecessary development and maintenance effort. Option D relies on manual intervention via the S3 console, which fails to meet the requirement for an automated solution with minimal operational overhead.