AWS Reserved Instances are available for which services?

AWS Reserved Instances are available for which services?

• A. EC2, RDS, Redshift, DynamoDB
• B. EC2, S3, Lambda, CloudFront
• C. RDS, DynamoDB, Elasticsearch
• D. EC2 only

Answer: (A)

Reserved Instances are long-term capacity commitments that reduce cost for services with steady, always-on usage. They are available for EC2 compute instances, RDS database instances, Redshift clusters, and DynamoDB provisioned capacity. The other services listed—S3 storage, Lambda, and CloudFront—are priced by usage (storage, requests, or data transfer) rather than by reserved capacity, so they don’t have Reserved Instances.

Reserved Instances are long-term capacity commitments that reduce cost for services with steady, always-on usage. They are available for EC2 compute instances, RDS database instances, Redshift clusters, and DynamoDB provisioned capacity. The other services listed—S3 storage, Lambda, and CloudFront—are priced by usage (storage, requests, or data transfer) rather than by reserved capacity, so they don’t have Reserved Instances.