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SOA-C02 · Question #524

A company has a stateless application that is hosted on a fleet of 10 Amazon EC2 On-Demand Instances in an Auto Scaling group. A minimum of 6 instances are needed to meet service requirements. Which…

The correct answer is A. Use a Spot Fleet with an On-Demand capacity of 6 instances. Amazon EC2 Auto Scaling allocates your Spot Instances from the N number of pools per Availability Zone that you specify and from the Spot Instance pools with the lowest price in each Availability Zone…

Submitted by haru.x· Mar 30, 2026Cost and Performance Optimization

Question

A company has a stateless application that is hosted on a fleet of 10 Amazon EC2 On-Demand Instances in an Auto Scaling group. A minimum of 6 instances are needed to meet service requirements. Which action will maintain uptime for the application MOST cost-effectively?

Options

  • AUse a Spot Fleet with an On-Demand capacity of 6 instances.
  • BUpdate the Auto Scaling group with a minimum of 6 On-Demand Instances and a maximum of 10
  • CUpdate the Auto Scaling group with a minimum of 1 On-Demand Instance and a maximum of 6
  • DUse a Spot Fleet with a target capacity of 6 instances.

How the community answered

(52 responses)
  • A
    71% (37)
  • B
    15% (8)
  • C
    10% (5)
  • D
    4% (2)

Explanation

Amazon EC2 Auto Scaling allocates your Spot Instances from the N number of pools per Availability Zone that you specify and from the Spot Instance pools with the lowest price in each Availability Zone. https://docs.aws.amazon.com/autoscaling/ec2/userguide/ec2-auto-scaling-mixed-instances-

Topics

#Spot Fleet#On-Demand capacity#Auto Scaling#cost optimization

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