i always get nervous when the discussion count hits 30-50+ . You know something isn't right :D , if its just below 20, then i just skip and continue

C is the correct answer - if you want Datacenter level high availability - vms should be deployed in different zones.

Availability Zones protects DC failures Availability Sets protects host update and/or fault

C is correct

C. Each virtual machine should be deployed in a separate Availability Zone.

C is the correct answer. Availability sets are used to protect applications from hardware failures within an Azure data center, availability zones protect applications from complete Azure data center failures.

Exactly the same question was on todays exam. (7th April 2023)

ANSWER:C Explanation: An Availability Zone in an Azure region is a combination of a fault domain and an update domain. For example, if you create three or more VMs across three zones in an Azure region, your VMs are effectively distributed across three fault domains and three update domains. The Azure platform recognizes this distribution across update domains to make sure that VMs in different zones are not updated at the same time. Reference link https://learn.microsoft.com/en-us/training/modules/configure-virtual-machine-availability/5-review-availability-zones

Within each Azure region are 1 to three unique physical locations, referred to as availability zones. as some AZ has only 1 datacenter, C should be more accurate.

A is tempting, but remember, according to MSFT an AZ "could" have just ONE data center, and if that failed then no redundancy. So the only option that is 100% sure in all situations is C.

Correct Answer: C

Your confusion stops here. Answer is A. This comment jrv116psu below led me to A. jrv116psu 9 months ago Mlantonis ... i completely agree about the AZ AS description.. but AZ's dont have limit of number of available machines do they? it says ensure that at least 2 machines are available... if you ave VM1 in AZ1 vm2 in AZ2, vm3 in AZ3, there's nothing stopping AZ1 and 2 going offline... AZ3 wont autocorrect and spinup new vms... thoughts?

Key phrase ".... if a single Azure datacenter becomes unavailable." Can't be A, B or D. Go with C

Answer is C You can think of each availability zone as a separate fault domain and update domain. So in a given azure region if you have 3 availability zones, then it's like you have 3 fault domains and 3 update domains. So, for example, if you create three VMs across three availability zones in an Azure region, your VMs are effectively distributed across three fault domains and three update domains. If one of the Availability Zones has gone down for some reason, we still have 2 VMs from the rest of the 2 availability zones. Similarly, if there is an update or a patch to be applied, azure schedules these at different times for different availability zones. So this means, we have just one of the availability zones affected while the update is being applied. The rest of the 2 zones are unaffected.

Placing in three seperate zones does not garantee availability over these zones

Put all VMs in "one" AZ will not guarantee redundancy.

C for me.. AV zone should be 3 as refers to 3 different Data centers, hence lose one 2 available