AWS Certified Cloud Practitioner (CLF-C02) — Question 230

A user has a stateful workload that will run on Amazon EC2 for the next 3 years.

What is the MOST cost-effective pricing model for this workload?

Answer options

• A. On-Demand Instances
• B. Reserved Instances
• C. Dedicated Instances
• D. Spot Instances

Correct answer: B

Explanation

The most cost-effective option for a stateful workload running for an extended period, such as 3 years, is Reserved Instances, as they provide significant savings over the On-Demand pricing model. On-Demand Instances are suitable for short-term workloads, while Dedicated Instances are more expensive and unnecessary for this use case. Spot Instances, while cheaper, are not ideal for stateful workloads due to their potential for interruption.