AWS Certified SysOps Administrator – Associate (legacy) — Question 611

A medical imaging company needs to process large amounts of imaging data in real time using a specific instance type. The company wants to guarantee sufficient resource capacity for 1 year.
Which action will meet these requirements in the MOST cost-effective manner?

Answer options

• A. Create 1-year On-Demand Capacity Reservations in the specific Availability Zones.
• B. Launch Amazon EC2 instances with termination protection enabled.
• C. Purchase 1-year Reserved Instances in the specific Availability Zones.
• D. Use a Spot Fleet across multiple Availability Zones.

Correct answer: A

Explanation

On-Demand Capacity Reservations guarantee that the required Amazon EC2 capacity will be available in the specified Availability Zone whenever it is needed. This capacity guarantee can be combined with a 1-year Savings Plan or Reserved Instance to achieve the most cost-effective pricing. Other options like Spot Fleets do not offer capacity guarantees, and termination protection merely prevents accidental instance deletion rather than securing future capacity.