Explanation:
To ensure no performance degradation in the event of an Availability Zone (AZ) failure, the remaining AZs must be able to handle the minimum required load (12 instances).
Comparing the passing options, Option D (18 instances) uses fewer instances than Option B (24 instances), making it the most cost-effective and efficient solution that meets the requirement.
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Question 39.
A company's web application runs on Amazon EC2 instances in a single AWS Region. The infrastructure must be designed so the application remains available with no performance degradation in the event of an Availability Zone (AZ) failure. To ensure optimal performance, the application must maintain a minimum of 12 instances at all times. Which solution will meet the requirements with the fewest running instances possible?
A
2 AZs with 6 instances in each AZ
B
2 AZs with 12 instances in each AZ
C
3 AZs with 4 instances in each AZ
D
3 AZs with 6 instances in each AZ
E
None of the above.
F
None of the above.
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