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Microsoft Discussions

Exam AZ-104 topic 4 question 49 discussion

Actual exam question from Microsoft's AZ-104
Question #: 49
Topic #: 4
[All AZ-104 Questions]

You plan to deploy three Azure virtual machines named VM1, VM2, and VM3. The virtual machines will host a web app named App1.
You need to ensure that at least two virtual machines are available if a single Azure datacenter becomes unavailable.
What should you deploy?

  • A. all three virtual machines in a single Availability Zone
  • B. all virtual machines in a single Availability Set
  • C. each virtual machine in a separate Availability Zone
  • D. each virtual machine in a separate Availability Set
Show Suggested Answer Hide Answer
Suggested Answer: C 🗳️
Use availability zones to protect from datacenter level failures.
Reference:
https://docs.microsoft.com/en-us/azure/virtual-machines/windows/manage-availability https://docs.microsoft.com/en-us/azure/virtual-machines/windows/tutorial-availability-sets
by kt_tk_2020 at Dec. 1, 2020, 11:27 a.m.

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allray15
Highly Voted 2 years, 8 months ago
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
upvoted 130 times
ServerBrain
2 months, 2 weeks ago
you are right. but sometimes you don't have to follow the entire debate. I have learned to go with the most upvoted as the final answer.
upvoted 1 times
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sarpay784
2 years, 6 months ago
:D :D :D :D me too
upvoted 2 times
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ciscogeek
2 years, 8 months ago
or, 30+
upvoted 4 times
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Izee24
2 years, 3 months ago
Me too.
upvoted 1 times
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kt_tk_2020
Highly Voted 3 years ago
C is the correct answer - if you want Datacenter level high availability - vms should be deployed in different zones.
upvoted 100 times
Somewhatbusy
2 years, 11 months ago
Availability set - Within data centre - configure update domains and fault domains Availability zone - Within region (usually three data centres per region)
upvoted 85 times
FitObelix
2 years, 5 months ago
Simply adding that an availability zone can have only one datacenter. That´s why i think it can´t be option A. C option ensures the availability, even if each zone is made of only one datacenter each
upvoted 8 times
kira1kira22
4 months, 1 week ago
@FitObelix , I agree , A is wrong because a zone may have only one DC
upvoted 1 times
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walexkino
2 years, 6 months ago
your explanation was simple and precise unlike other sprouting nonsense here.
upvoted 12 times
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Tomix
Most Recent 5 months, 1 week ago
C. Each virtual machine should be deployed in a separate Availability Zone.
upvoted 1 times
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GokuSS
7 months, 3 weeks ago
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.
upvoted 3 times
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NJTH
8 months ago
Exactly the same question was on todays exam. (7th April 2023)
upvoted 6 times
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Jamal786
1 year ago
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
upvoted 3 times
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Asymptote
1 year, 1 month ago
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.
upvoted 1 times
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61Reasons
1 year, 3 months ago
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.
upvoted 3 times
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EmnCours
1 year, 3 months ago
Selected Answer: C
Correct Answer: C
upvoted 3 times
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klexams
1 year, 5 months ago
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?
upvoted 2 times
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Pravda
1 year, 5 months ago
Key phrase ".... if a single Azure datacenter becomes unavailable." Can't be A, B or D. Go with C
upvoted 3 times
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suryamk
1 year, 5 months ago
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.
upvoted 3 times
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BorisBoef
1 year, 5 months ago
Selected Answer: A
Placing in three seperate zones does not garantee availability over these zones
upvoted 2 times
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GregGG
1 year, 5 months ago
Selected Answer: C
Put all VMs in "one" AZ will not guarantee redundancy.
upvoted 4 times
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Lazylinux
1 year, 5 months ago
Selected Answer: C
C for me.. AV zone should be 3 as refers to 3 different Data centers, hence lose one 2 available
upvoted 3 times
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manalshowaei
1 year, 6 months ago
Selected Answer: C
C. each virtual machine in a separate Availability Zone
upvoted 2 times
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epomatti
1 year, 6 months ago
Selected Answer: C
Correct answer: C - each virtual machine in a separate Availability Zone
upvoted 2 times
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A (35%)
C (25%)
B (20%)
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