AWS Certified Database – Specialty — Question 244

A company has a 250 GB Amazon RDS Multi-AZ DB instance. The company’s disaster recovery policy requires an RPO of 6 hours in a second AWS Region.

Which solution will meet these requirements MOST cost-effectively?

Answer options

• A. Use RDS automated snapshots. Create an AWS Lambda function to copy the snapshot to a second Region.
• B. Use RDS automated snapshots every 6 hours. Use Amazon S3 Cross-Region Replication to copy the snapshot to a second Region.
• C. Use AWS Backup to take an RDS snapshot every 6 hours and to copy the snapshot to a second Region.
• D. Create an RDS cross-Region read replica in a second Region. Use AWS Backup to take an automated snapshot of the read replica every 6 hours.

Correct answer: C

Explanation

Option C is the correct answer because using AWS Backup to take snapshots every 6 hours and copy them to another Region satisfies the RPO requirement effectively and is typically more cost-efficient. Option A may incur additional costs for Lambda usage, while Option B involves S3 replication costs, and Option D is more expensive due to the overhead of maintaining a read replica.