AWS Certified DevOps Engineer – Professional (DOP-C02) — Question 240

A company needs a strategy for failover and disaster recovery of its data and application. The application uses a MySQL database and Amazon EC2 instances. The company requires a maximum RPO of 2 hours and a maximum RTO of 10 minutes for its data and application at all times.

Which combination of deployment strategies will meet these requirements? (Choose two.)

Answer options

• A. Create an Amazon Aurora Single-AZ cluster in multiple AWS Regions as the data store. Use Aurora's automatic recovery capabilities in the event of a disaster.
• B. Create an Amazon Aurora global database in two AWS Regions as the data store. In the event of a failure, promote the secondary Region to the primary for the application. Update the application to use the Aurora cluster endpoint in the secondary Region.
• C. Create an Amazon Aurora cluster in multiple AWS Regions as the data store. Use a Network Load Balancer to balance the database traffic in different Regions.
• D. Set up the application in two AWS Regions. Use Amazon Route 53 failover routing that points to Application Load Balancers in both Regions. Use health checks and Auto Scaling groups in each Region.
• E. Set up the application in two AWS Regions. Configure AWS Global Accelerator to point to Application Load Balancers (ALBs) in both Regions. Add both ALBs to a single endpoint group. Use health checks and Auto Scaling groups in each Region.

Correct answer: B, D

Explanation

Option B is correct because an Amazon Aurora global database allows for quick promotion of the secondary Region to primary, meeting the RPO and RTO requirements effectively. Option D is also right as it utilizes Route 53 for failover and includes health checks and Auto Scaling, ensuring high availability. Options A and C do not provide adequate failover capabilities, while option E, although robust, may introduce unnecessary complexity for the stated requirements.