AWS Certified Database – Specialty — Question 136

A large company is using an Amazon RDS for Oracle Multi-AZ DB instance with a Java application. As a part of its disaster recovery annual testing, the company would like to simulate an Availability Zone failure and record how the application reacts during the DB instance failover activity. The company does not want to make any code changes for this activity.
What should the company do to achieve this in the shortest amount of time?

Answer options

• A. Use a blue-green deployment with a complete application-level failover test
• B. Use the RDS console to reboot the DB instance by choosing the option to reboot with failover
• C. Use RDS fault injection queries to simulate the primary node failure
• D. Add a rule to the NACL to deny all traffic on the subnets associated with a single Availability Zone

Correct answer: B

Explanation

The correct answer is B because rebooting the DB instance with the failover option will simulate an Availability Zone failure quickly and efficiently, without needing code changes. Options A and C involve more complex setups or code modifications, while option D could lead to unintended service disruptions and is not a straightforward simulation of failover.