AZ-104 – Question 134

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8
HOTSPOT –
You have an Azure subscription that contains an Azure Availability Set named WEBPROD-AS-USE2 as shown in the following exhibit.

You add 14 virtual machines to WEBPROD-AS-USE2.
Use the drop-down menus to select the answer choice that completes each statement based on the information presented in the graphic.
NOTE: Each correct selection is worth one point.
Hot Area:

Correct Answer: 

Box 1: 2 –
There are 10 update domains. The 14 VMs are shared across the 10 update domains so four update domains will have two VMs and six update domains will have one VM. Only one update domain is rebooted at a time. Therefore, a maximum of two VMs will be offline.

Box 2: 7 –
There are 2 fault domains. The 14 VMs are shared across the 2 fault domains, so 7 VMs in each fault domain. A rack failure will affect one fault domain so 7 VMs will be offline.

Reference: https://docs.microsoft.com/en-us/azure/virtual-machines/windows/manage-availability

Explanation:
Box 1: 2
There are 10 update domains. The 14 VMs are shared across the 10 update domains, so 4 update domains will have 2 VMs and 6 update domains will have 1 VM. Only one update domain is rebooted at a time.

D1 D2 D3 D4 D5 D6 D7 D8 D9 D10
vm1 vm2 vm3 vm4 vm5 vm6 vm7 vm8 vm9 vm10
vm11 vm12 vm13 vm14

Maximum Down = 2

Minimum Down = 1

Box 2: 7
There are 2 fault domains. The 14 VMs are shared across the 2 fault domains, so 7 VMs in each fault domain. A rack failure will affect one fault domain so 7 VMs will be offline.
14 VM in 2 Fault Domain

Rack 1 Rack 2

vm1 vm8

vm2 vm9

vm3 vm10

vm4 vm11

vm5 vm12

vm6 vm13

vm7 vm14

Maximum Down = 7

Minimum Down = 7

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