AWS Certified Cloud Practitioner (CLF-C02) — Question 675

A company needs to run an application on Amazon EC2 instances without interruption.

Which EC2 instance purchasing option will meet this requirement MOST cost-effectively?

Answer options

Correct answer: C

Explanation

On-Demand Instances provide uninterrupted performance with no long-term commitment, making them the most cost-effective choice when the workload duration is unpredictable or short-term. Spot Instances are not suitable because they can be interrupted by AWS with short notice. Standard and Convertible Reserved Instances require a 1-year or 3-year commitment, which is not cost-effective if the application does not need to run over those extended periods.