Topic 1 Question 389
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?
2 AZs with 6 instances in each AZ
2 AZs with 12 instances in each AZ
3 AZs with 4 instances in each AZ
3 AZs with 6 instances in each AZ
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コメント(7)
- 正解だと思う選択肢: B
B. 2 AZs with 12 instances in each AZ
This configuration provides redundancy across two AZs and meets the minimum instance requirement. In the event of an AZ failure, the other AZ can handle the load. Option A (2 AZs with 6 instances in each AZ) does not meet the minimum instance requirement during an AZ failure, and options C and D distribute the instances across three AZs, which might lead to more running instances than necessary.
👍 2LemonGremlin2023/12/31 - 正解だと思う選択肢: D
D makes the most sense
MAX number is 18, if one AZ drops you have 12
For B: you would have MAX 24, which is more than 18
👍 2CofkoCof2024/01/06 - 正解だと思う選択肢: B
the application must maintain a minimum of 12 instances at all times. it means that 12 per available zone. B is correct.
👍 1WinAndWin2024/01/01
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