AWS Certified SysOps Administrator – Associate — Question 323

A company runs its web application on multiple Amazon EC2 instances that are part of an Auto Scaling group. The company wants the Auto Scaling group to scale out as soon as CPU utilization rises above 50% for the instances.

How should a SysOps administrator configure the Auto Scaling group to meet these requirements?

Answer options

• A. Configure the Auto Scaling group to scale based on events.
• B. Configure the Auto Scaling group to scale based on a schedule.
• C. Configure the Auto Scaling group to scale dynamically based on demand.
• D. Configure the Auto Scaling group to use predictive scaling.

Correct answer: C

Explanation

Dynamic scaling allows the Auto Scaling group to scale resources in or out automatically in response to real-time changes in demand, such as a CPU utilization metric exceeding 50%. Scheduled scaling is used when load changes are predictable by time, and predictive scaling uses machine learning to anticipate future capacity needs. Event-based scaling is typically used for specific lifecycle events rather than continuous metric-based thresholds like CPU utilization.