AWS Certified Cloud Practitioner — Question 486

A company wants its Amazon EC2 instances to share the same geographic area but use multiple independent underlying power sources.

Which solution achieves this goal?

Answer options

• A. Use EC2 instances in a single Availability Zone.
• B. Use EC2 instances in multiple AWS Regions.
• C. Use EC2 instances in multiple Availability Zones in the same AWS Region.
• D. Use EC2 instances in the same edge location and the same AWS Region.

Correct answer: C

Explanation

Availability Zones within an AWS Region are physically isolated from one another and operate on independent power, cooling, and network infrastructures while remaining in the same geographic area. Placing instances in a single Availability Zone does not offer power redundancy, whereas spreading them across multiple AWS Regions would place them in entirely different geographic areas. Edge locations are designed for content caching and delivery, not for hosting EC2 instances with independent power redundancy.