AWS Certified SysOps Administrator – Associate — Question 436

A company has migrated its application to AWS. The company will host the application on Amazon EC2 instances of multiple instance families.
During initial testing, a SysOps administrator identifies performance issues on selected EC2 instances. The company has a strict budget allocation policy, so the
SysOps administrator must use the right resource types with the performance characteristics to match the workload.
What should the SysOps administrator do to meet this requirement?

Answer options

• A. Purchase regional Reserved Instances (RIs) for immediate cost savings. Review and take action on the EC2 rightsizing recommendations in Cost Explorer. Exchange the RIs for the optimal instance family after rightsizing.
• B. Purchase zonal Reserved Instances (RIs) for the existing instances. Monitor the RI utilization in the AWS Billing and Cost Management console. Make adjustments to instance sizes to optimize utilization.
• C. Review and take action on AWS Compute Optimizer recommendations. Purchase Compute Savings Plans to reduce the cost that is required to run the compute resources.
• D. Review resource utilization metrics in the AWS Cost and Usage Report. Rightsize the EC2 instances. Create On-Demand Capacity Reservations for the rightsized resources.

Correct answer: C

Explanation

AWS Compute Optimizer analyzes historical resource utilization to recommend the optimal Amazon EC2 instance types and sizes, ensuring that performance requirements are met without overprovisioning. Pairing these recommendations with Compute Savings Plans offers the budget-friendly flexibility needed to apply cost savings automatically across different instance families. Other options involving Reserved Instances are less flexible during rightsizing phases, and Cost and Usage Reports do not provide direct performance-based sizing optimization recommendations.