SOA-C02 · Question #526
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…
The correct answer is D. 3 AZs with 6 instances in each AZ1. The question states that 12 instances need to be running at all times. In 3 AZ's with 6 instances in each = 18 instances. If you lose 1 AZ, you have instances running.
Question
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?
Options
- A2 AZs with 6 instances in each AZ
- B2 AZs with 12 instances in each AZ
- C3 AZs with 4 instances in each AZ
- D3 AZs with 6 instances in each AZ1
How the community answered
(18 responses)- A6% (1)
- B11% (2)
- D83% (15)
Explanation
The question states that 12 instances need to be running at all times. In 3 AZ's with 6 instances in each = 18 instances. If you lose 1 AZ, you have instances running.
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