AWS Certified Cloud Practitioner — Question 521

A company is running a workload in the AWS Cloud.

Which AWS best practice ensures the MOST cost-effective architecture for the workload?

Answer options

• A. Loose coupling
• B. Rightsizing
• C. Caching
• D. Redundancy

Correct answer: B

Explanation

Rightsizing ensures cost-effectiveness by matching instance sizes and resource types to the actual performance and capacity requirements of the workload. While principles like loose coupling, caching, and redundancy improve system reliability and performance, they do not directly target cost optimization in the way that rightsizing does.