AWS Certified Solutions Architect – Associate (SAA-C02) — Question 100

A company relies on an application that needs at least 4 Amazon EC2 instances during regular traffic and must scale up to 12 EC2 instances during peak loads.
The application is critical to the business and must be highly available.
Which solution will meet these requirements?

Answer options

• A. Deploy the EC2 instances in an Auto Scaling group. Set the minimum to 4 and the maximum to 12, with 2 in Availability Zone A and 2 in Availability Zone B.
• B. Deploy the EC2 instances in an Auto Scaling group. Set the minimum to 4 and the maximum to 12, with all 4 in Availability Zone A.
• C. Deploy the EC2 instances in an Auto Scaling group. Set the minimum to 8 and the maximum to 12, with 4 in Availability Zone A and 4 in Availability Zone B.
• D. Deploy the EC2 instances in an Auto Scaling group. Set the minimum to 8 and the maximum to 12, with all 8 in Availability Zone A.

Correct answer: C

Explanation

Option C is correct because it ensures that there are enough EC2 instances (8) across both Availability Zones, enhancing availability and meeting the scaling requirements. Options A and B do not provide sufficient instances across multiple zones for high availability, while Option D places all instances in a single Availability Zone, which does not meet the high availability requirement.