AWS Certified Cloud Practitioner — Question 445

Which actions are examples of a company's effort to rightsize its AWS resources to control cloud costs? (Choose two.)

Answer options

• A. Switch from Amazon RDS to Amazon DynamoDB to accommodate NoSQL datasets.
• B. Base the selection of Amazon EC2 instance types on past utilization patterns.
• C. Use Amazon S3 Lifecycle policies to move objects that users access infrequently to lower-cost storage tiers.
• D. Use Multi-AZ deployments for Amazon RDS.
• E. Replace existing Amazon EC2 instances with AWS Elastic Beanstalk.

Correct answer: B, C

Explanation

Rightsizing involves matching cloud resource sizes and types to actual workload demands to minimize costs. Selecting Amazon EC2 instances based on historical usage patterns and using Amazon S3 Lifecycle policies to transition infrequently accessed data to cheaper storage are classic rightsizing strategies. Other options, like Multi-AZ deployments or migrating database engines, focus on high availability or architectural changes rather than rightsizing.