SAP-C02 Design for New Solutions Practice Question
A company is designing a disaster recovery solution for a critical application that runs on Amazon EC2 instances in a single AWS Region. The application uses an Amazon RDS for MySQL database. The recovery time objective (RTO) is 1 hour and the recovery point objective (RPO) is 15 minutes. Which combination of steps should the company take to meet these requirements? (Choose THREE.)
⚠ Common exam trap
Watch out — candidates often confuse Multi-AZ deployments (which provide high availability within a Region) with cross-Region disaster recovery, failing to recognize that Multi-AZ does not protect against a full Region outage.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Amazon Route 53 health checks to monitor the primary application and configure DNS failover to the secondary Region.
Route 53 health checks can monitor the primary application's endpoint, and DNS failover to a secondary Region enables automatic traffic redirection within minutes, aligning with the 1-hour RTO. This approach provides a simple, stateless failover mechanism without requiring complex routing changes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Use Amazon Route 53 health checks to monitor the primary application and configure DNS failover to the secondary Region.
Why this is correct
Route 53 health checks and failover route traffic to the secondary Region when the primary fails.
- ✗
Configure a Multi-AZ deployment for the RDS database in the primary Region.
Why it's wrong here
Multi-AZ is for high availability within a Region, not for cross-Region DR.
- ✗
Deploy the application on Amazon Aurora Global Database.
Why it's wrong here
Aurora is a different database engine, not RDS MySQL.
- ✓
Create an Amazon Machine Image (AMI) of the EC2 instances and copy it to the secondary Region. Use an Auto Scaling group to launch instances from the AMI.
Why this is correct
Copying AMIs to another Region allows recovery of EC2 instances.
- ✓
Create a cross-Region read replica of the RDS MySQL database in the secondary Region.
Why this is correct
Cross-Region read replicas provide asynchronous replication with low RPO.
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