AWS Certified Solutions Architect – Professional — Question 586

A user wants to configure AutoScaling which scales up when the CPU utilization is above 70% and scales down when the CPU utilization is below 30%.
How can the user configure AutoScaling for the above mentioned condition?

Answer options

• A. Configure ELB to notify AutoScaling on load increase or decrease
• B. Use AutoScaling with a schedule
• C. Use AutoScaling by manually modifying the desired capacity during a condition
• D. Use dynamic AutoScaling with a policy

Correct answer: D

Explanation

Dynamic scaling policies allow AutoScaling to automatically scale capacity in response to live metrics like CPU utilization. Scheduled scaling is unsuitable here because it relies on predictable time patterns rather than real-time performance thresholds. Manual modifications and ELB notifications do not provide the automated, metric-driven scaling required for this scenario.