A company has an Amazon RDS Multi-AZ DB instances that is 200 GB in size with an RPO of 6 hours. To meet the company's disaster recovery policies, the database backup needs to be copied into another…

Question

Options

• AUse Amazon RDS automated snapshots and use AWS Lambda to copy the snapshot into
• BUse Amazon RDS automated snapshots every 6 hours and use Amazon S3 cross-Region
• CCreate an AWS Lambda function to take an Amazon RDS snapshot every 6 hours and use a
• DCreate a cross-Region read replica for Amazon RDS in another Region and take an automated

• A
  4% (2)
• B
  2% (1)
• C
  85% (44)
• D
  10% (5)

Explanation

Explanation

Option C is correct because creating a Lambda function to trigger an RDS snapshot every 6 hours and then copying that snapshot to another Region is the most cost-effective and operationally efficient approach - it automates the entire process, meets the 6-hour RPO requirement, and only incurs storage costs for the snapshots themselves without requiring additional compute resources.

Why the distractors are wrong:

• Option A is incomplete/incorrect because simply using automated snapshots with Lambda to copy them doesn't specify the required 6-hour frequency, and automated snapshots cannot be directly copied across Regions without manual intervention
• Option B is wrong because RDS automated snapshots are not configurable to run every 6 hours - automated snapshots only run once daily, making it impossible to meet a 6-hour RPO this way
• Option D is wrong because cross-Region read replicas are significantly more expensive than snapshots (you pay for a full running DB instance), which fails the cost-effectiveness requirement

Memory Tip

Remember: "RPO = Frequency, Lambda = Automation" - whenever an exam question mentions a specific RPO interval (like 6 hours) combined with cross-Region copying, think Lambda-triggered snapshots. Automated snapshots are daily-only, and read replicas are too costly for pure DR purposes.

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