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SAA-C03 · Question #667

SAA-C03 Question #667: Real Exam Question with Answer & Explanation

The correct answer is D: AWS Auto Scaling. AWS Auto Scaling automatically adjusts the number of running EC2 instances based on real-time demand. During daytime hours, it scales out to handle higher usage, and during nighttime hours, it scales in to reduce instance count - thereby optimizing costs automatically according t

Submitted by kavita_s· Mar 4, 2026Design Cost-Optimized Architectures

Question

A company runs an application on Amazon EC2 instances. EC2 instance usage is higher during daytime hours than nighttime hours. A solutions architect wants to automatically optimize Amazon EC2 costs based on this usage pattern. Which AWS service or purchasing option will meet this requirement?

Options

  • ASpot Instances
  • BReserved Instances
  • CAWS CloudFormation
  • DAWS Auto Scaling

Explanation

AWS Auto Scaling automatically adjusts the number of running EC2 instances based on real-time demand. During daytime hours, it scales out to handle higher usage, and during nighttime hours, it scales in to reduce instance count - thereby optimizing costs automatically according to the usage pattern without manual intervention.

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