AWS Certified Solutions Architect – Associate (SAA-C02) — Question 104

A company has created an isolated backup of its environment in another Region. The application is running in warm standby mode and is fronted by an
Application Load Balancer (ALB). The current failover process is manual and requires updating a DNS alias record to point to the secondary ALB in another
Region.
What should a solutions architect do to automate the failover process?

Answer options

• A. Enable an ALB health check
• B. Enable an Amazon Route 53 health check.
• C. Crate an CNAME record on Amazon Route 53 pointing to the ALB endpoint.
• D. Create conditional forwarding rules on Amazon Route 53 pointing to an internal BIND DNS server.

Correct answer: B

Explanation

The correct answer is B, as enabling an Amazon Route 53 health check allows for automatic DNS failover based on the health of the primary ALB. Option A only monitors the health of the ALB, but does not facilitate DNS changes. Option C creates a CNAME record but does not automate the failover process, and option D involves internal DNS management which is not relevant for automating failover in this context.