Answer: Compute Savings Plan

## Explanation **Correct Answer: A. Compute Savings Plan** **Why Compute Savings Plan is the best choice:** 1. **Flexibility**: Compute Savings Plans offer the highest level of flexibility among AWS cost-saving options. They allow you to change: - Instance family - Instance size - Operating system - Tenancy - AWS Region (within the same AWS account) 2. **Cost savings**: Compute Savings Plans provide the same discount level as Convertible Reserved Instances (up to 66% savings) but with much greater flexibility. 3. **Meets the specific requirements**: - **3-year commitment**: The company wants to maximize savings over 3 years - **Flexibility to change instance family/sizes in 6 months**: Compute Savings Plans allow this flexibility immediately, not after 6 months - **Cost-effectiveness**: Provides maximum savings while maintaining flexibility **Why other options are not optimal:** - **B. EC2 Instance Savings Plan**: While offering good discounts (up to 72%), these are less flexible than Compute Savings Plans. EC2 Instance Savings Plans lock you to: - A specific instance family (e.g., M5, C5) - A specific AWS Region - You cannot change instance families, only sizes within the same family - **C. Zonal Reserved Instances**: These offer the least flexibility. They are tied to: - Specific instance type - Specific Availability Zone - Specific tenancy - No ability to change instance families or sizes - **D. Standard Reserved Instances**: Similar limitations to Zonal RIs but without the AZ lock-in. Still tied to: - Specific instance type - Specific Region - Specific platform/OS - No flexibility to change instance families **Key AWS Cost Optimization Concepts:** - **Compute Savings Plans**: Most flexible, apply to EC2, Fargate, and Lambda usage - **EC2 Instance Savings Plans**: Less flexible but higher discounts for specific instance families - **Reserved Instances**: Least flexible but predictable costs **Recommendation**: For companies needing flexibility to adapt to changing application needs while maximizing long-term savings, Compute Savings Plans are the optimal choice.

Author: LeetQuiz Editorial Team