AWS Certified SysOps Administrator – Associate (legacy) — Question 264

A user is accessing RDS from an application. The user has enabled the Multi AZ feature with the MS SQL RDS DB. During a planned outage how will AWS ensure that a switch from DB to a standby replica will not affect access to the application?

Answer options

• A. RDS will have an internal IP which will redirect all requests to the new DB
• B. RDS uses DNS to switch over to stand by replica for seamless transition
• C. The switch over changes Hardware so RDS does not need to worry about access
• D. RDS will have both the DBs running independently and the user has to manually switch over

Correct answer: B

Explanation

The correct answer is B because RDS utilizes DNS to facilitate a seamless switch to the standby replica, ensuring that the application remains connected without interruption. Option A is incorrect as RDS does not rely on internal IP redirection for failover. Option C is misleading since the switch does not solely involve hardware changes, and option D is wrong because the transition is automated without user intervention.