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…

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…

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

How the community answered

(36 responses)

A
11% (4)
B
8% (3)
C
3% (1)
D
78% (28)

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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