Microsoft Azure Architect Design (legacy) — Question 48

Your company purchases an app named App1.
You plan to run App1 on seven Azure virtual machines in an Availability Set. The number of fault domains is set to 3. The number of update domains is set to 20.
You need to identify how many App1 instances will remain available during a period of planned maintenance.
How many App1 instances should you identify?

Answer options

Correct answer: C

Explanation

During planned maintenance, the number of instances that can remain available is determined by the number of fault domains. With 3 fault domains, 3 instances can be taken down for maintenance, leaving 4 available. However, since only 7 instances are deployed, and the update domains exceed the fault domains, only 6 instances can remain operational during such maintenance, making C the correct answer, while A, B, and D do not reflect the correct count of available instances.