AWS Certified Cloud Practitioner (CLF-C02) — Question 556

A company is planning to use the Amazon EC2 instances as web servers. Customers from around the world will use the web servers. Most customers will use the web servers only during certain hours of the day.

How should the company deploy the EC2 instances to achieve the LOWEST operational cost?

Answer options

• A. In multiple Availability Zones
• B. In an Auto Scaling group
• C. In a placement group
• D. In private subnets

Correct answer: B

Explanation

Using an Auto Scaling group allows the company to dynamically scale the number of Amazon EC2 instances up or down based on actual demand, ensuring they only pay for compute capacity when needed. Deploying in multiple Availability Zones or private subnets enhances high availability and security but does not scale resources to optimize costs. Placement groups are designed for low-latency network performance and do not provide cost-savings for variable workloads.