AWS Certified Solutions Architect – Associate (SAA-C03) — Question 332

A company hosts a web application on multiple Amazon EC2 instances. The EC2 instances are in an Auto Scaling group that scales in response to user demand. The company wants to optimize cost savings without making a long-term commitment.

Which EC2 instance purchasing option should a solutions architect recommend to meet these requirements?

Answer options

Correct answer: C

Explanation

Using a combination of On-Demand Instances and Spot Instances allows the application to maintain a reliable baseline capacity while scaling cost-effectively using Spot Instances without any long-term commitment. Dedicated Instances and On-Demand Instances alone do not offer the desired cost optimization. Reserved Instances are incorrect because they require a 1-year or 3-year commitment, which violates the requirement.