AWS Certified SysOps Administrator – Associate (SOA-C03) — Question 58

A company runs an application on Amazon EC2 instances that are in an Amazon EC2 Auto Scaling group. Scale-out actions take a long time to become complete because of long-running boot scripts. A CloudOps engineer must implement a solution to reduce the required time for scale-out actions without overprovisioning the Auto Scaling group.
Which solution will meet these requirements?

Answer options

• A. Change the launch configuration to use a larger instance size.
• B. Increase the minimum number of instances in the Auto Scaling group.
• C. Add a predictive scaling policy to the Auto Scaling group.
• D. Add a warm pool to the Auto Scaling group.

Correct answer: D

Explanation

The correct answer is D because adding a warm pool allows instances to be pre-initialized and ready to handle traffic, significantly speeding up scale-out actions. Option A would not address the boot script delay but merely increase instance capacity. Option B would not effectively reduce scale-out time since it does not prepare instances in advance. Option C may enhance scaling decisions but does not directly mitigate long boot times.