AWS Certified SysOps Administrator – Associate (legacy) — Question 804

A user has configured ELB with Auto Scaling. The user temporarily suspended the Auto Scaling terminate process. What might the Availability Zone Rebalancing process (AZRebalance) conse-quently cause during this period?

Answer options

• A. Auto Scaling will keep launching instances in all AZs until the maximum instance number is reached.
• B. AZ Rebalancing might now allow Auto Scaling to launch or terminate any instances.
• C. AZ Rebalancing might allow the number instances in an Availability Zone to remain higher than the maximum size
• D. It is not possible to suspend the terminate process while keeping the launch active.

Correct answer: C

Explanation

If the Terminate process is suspended, the AZRebalance process can still launch new instances in underrepresented Availability Zones to achieve balance, but it cannot terminate the redundant instances in overrepresented zones. Consequently, Auto Scaling allows the group to temporarily grow up to 10% past its maximum size. Suspending Terminate while keeping Launch active is a supported configuration, making the other options incorrect.