Answer-first summary for fast verification
Answer: Spot Instances
## Explanation **Spot Instances** are the most cost-effective option for this use case because: - **Cost Savings**: Spot Instances offer up to 90% discount compared to On-Demand Instances - **Interruptible Workloads**: The test workloads can be interrupted, which aligns perfectly with Spot Instances' nature (AWS can reclaim them with a 2-minute warning) - **Flexible Timing**: The workloads don't require specific start times, making them ideal for Spot Instances which are available when AWS has excess capacity **Why other options are less suitable**: - **On-Demand Instances**: Most expensive option, best for workloads that need guaranteed availability - **Reserved Instances**: Require long-term commitment and are better for predictable, steady-state workloads - **Dedicated Hosts**: Most expensive option, designed for regulatory compliance or software licensing requirements Spot Instances provide the optimal balance of cost-effectiveness and suitability for interruptible test workloads.
Author: Ritesh Yadav
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A company plans to move its test workloads to Amazon EC2. The test workloads can be interrupted and are not required to start at a particular time. Which EC2 instance purchasing option is MOST cost-effective for this use case?
A
On-Demand Instances
B
Spot Instances
C
Reserved Instances
D
Dedicated Hosts
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