SAP-C02 Question 511
Select 3A company is running multiple workloads on Amazon EC2 instances across several AWS Regions. They have recently noticed a significant increase in their monthly AWS bill and have asked you to identify cost optimization opportunities. Upon reviewing their environment, you discover the following: Some EC2 instances are underutilized, some workloads can tolerate interruptions, and the company is using multiple Reserved Instances that are not fully utilized. What are the best actions to recommend for cost optimization?
- A
Resize underutilized EC2 instances to smaller instance types or leverage EC2 Auto Scaling.
- B
Configure Spot Instances for workloads that can tolerate interruptions.
- C
Purchase additional Reserved Instances to cover all potential future workloads.
- D
Sell unused Reserved Instances on the Reserved Instance Marketplace.
- E
Migrate workloads to AWS Lambda to eliminate EC2 costs entirely.
Show answer and explanation
Correct answers: A, B, D
Explanation
To optimize costs, it's important to address underutilized resources (resize or use Auto Scaling), leverage cost-effective alternatives like Spot Instances for interrupt-tolerant workloads, and recover costs associated with unused Reserved Instances by selling them in the Reserved Instance Marketplace. These actions directly target inefficiencies and reduce unnecessary expenses while aligning with the company's workload requirements.
- A. Correct.
Correct. Resizing underutilized EC2 instances to smaller instance types or leveraging EC2 Auto Scaling can significantly reduce costs by ensuring that resources are not over-provisioned.
- B. Correct.
Correct. Spot Instances are highly cost-effective for workloads that can tolerate interruptions, as they are available at a fraction of the on-demand price.
- C. Incorrect.
Incorrect. Purchasing additional Reserved Instances without proper utilization planning may lead to further wastage and increased costs rather than optimization.
- D. Correct.
Correct. Selling unused Reserved Instances on the Reserved Instance Marketplace can help recover some of the costs associated with the unused capacity.
- E. Incorrect.
Incorrect. While AWS Lambda can eliminate EC2 costs for some workloads, migrating all workloads to Lambda may not be feasible or cost-effective given the company's existing environment and workload requirements.