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AWS Certified Solutions Architect study material · question 479 of 500

How is the hourly price of a Spot Instance determined?

  1. It is negotiated when the Spot request is created
  2. EC2 sets it per instance type and Availability Zone, adjusting with long-term supply and demand
  3. Customers bid against each other in real time
  4. It is fixed at a percentage of the On-Demand price
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Answer: B. EC2 sets it per instance type and Availability Zone, adjusting with long-term supply and demand

The Spot price is set by EC2 and moves gradually, and the instance runs whenever capacity is available below the On-Demand price.

Source: Spot Instances (Amazon Web Services) — Spot Instances

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