AWS Certified Cloud Practitioner — Question 924

A company needs to run an application on Amazon EC2 instances. The instances cannot be interrupted at any time. The company needs an instance purchasing option that requires no long-term commitment or upfront payment.
Which instance purchasing option will meet these requirements MOST cost-effectively?

Answer options

Correct answer: A

Explanation

On-Demand Instances are the most cost-effective choice because they guarantee no interruptions and do not require any upfront payments or long-term commitments. Spot Instances are unsuitable because they can be interrupted when AWS needs the capacity back, while Reserved Instances require a 1-year or 3-year commitment. Dedicated Hosts are much more expensive and unnecessary for the stated requirements.