AWS Certified Solutions Architect – Associate (SAA-C02) — Question 161

A company hosts its website on AWS. To address the highly variable demand, the company has implemented Amazon EC2 Auto Scaling. Management is concerned that the company is over-provisioning its infrastructure, especially at the front end of the three-tier application. A solutions architect needs to ensure costs are optimized without impacting performance.
What should the solutions architect do to accomplish this?

Answer options

• A. Use Auto Scaling with Reserved Instances.
• B. Use Auto Scaling with a scheduled scaling policy.
• C. Use Auto Scaling with the suspend-resume feature.
• D. Use Auto Scaling with a target tracking scaling policy.

Correct answer: D

Explanation

The correct answer, D, is appropriate because a target tracking scaling policy automatically adjusts the number of EC2 instances based on real-time demand, ensuring efficient resource use without sacrificing performance. Options A and B do not provide the same level of responsiveness to fluctuating demand, while option C focuses on temporarily stopping scaling actions, which does not address the need for optimization.