AWS Certified Solutions Architect Professional SAP-C02 Practice Question
A company uses AWS Organizations with consolidated billing. Development teams in several member accounts run microservices as Amazon ECS services on AWS Fargate in us-east-1, us-west-2, and eu-west-1. The company wants to reduce compute costs but must retain the flexibility to move workloads between Regions and to migrate some services to AWS Lambda in the future. Finance also wants a single, centrally managed commitment that automatically applies the discount to all member accounts. Which approach will MOST cost-effectively meet these requirements?
Buy separate Compute Savings Plans in each member account and disable discount sharing to keep cost allocation accurate.
Buy a 1-year, partial-upfront Compute Savings Plan in the management account and leave Reserved Instances and Savings Plans discount sharing enabled for all linked accounts.
Enable Fargate Spot capacity providers for every service instead of purchasing any Savings Plans.
Buy 3-year, no-upfront EC2 Instance Savings Plans for each Region in the management account.
The best solution is to purchase a Compute Savings Plan in the management (payer) account and keep Reserved Instances and Savings Plans discount sharing enabled. Compute Savings Plans automatically apply to any EC2, Fargate, or Lambda usage in any Region, so the company can freely shift container workloads between Regions or replace them with Lambda without losing the discount. Because the plan is bought in the payer account and sharing is turned on, the commitment is applied first to the payer account and then to every linked account, giving organization-wide coverage without separate purchases.
EC2 Instance Savings Plans are Region- and instance-family-specific and do not cover Fargate or Lambda, so they would force regional commitments and lose flexibility. Buying separate Savings Plans in each member account creates commitment silos and is harder to manage. Fargate Spot can cut costs but offers no Lambda discount and provides only best-effort capacity, so it does not satisfy the requirement for a centrally managed, predictable discount.
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