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Exam AZ-900 topic 1 question 116 discussion

Actual exam question from Microsoft's AZ-900
Question #: 116
Topic #: 1
[All AZ-900 Questions]

HOTSPOT -
You plan to deploy a critical line-of-business application to Azure.
The application will run on an Azure virtual machine.
You need to recommend a deployment solution for the application. The solution must provide a guaranteed availability of 99.99 percent.
What is the minimum number of virtual machines and the minimum number of availability zones you should recommend for the deployment? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.
Hot Area:

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Suggested Answer:
You need a minimum of two virtual machines with each one located in a different availability zone.
Availability Zones is a high-availability offering that protects your applications and data from datacenter failures. Availability Zones are unique physical locations within an Azure region. Each zone is made up of one or more datacenters equipped with independent power, cooling, and networking. To ensure resiliency, there's a minimum of three separate zones in all enabled regions. The physical separation of Availability Zones within a region protects applications and data from datacenter failures. Zone-redundant services replicate your applications and data across Availability Zones to protect from single-points-of-failure. With Availability
Zones, Azure offers industry best 99.99% VM uptime SLA.
References:
https://docs.microsoft.com/en-us/azure/availability-zones/az-overview
by rgalfaro at Dec. 3, 2019, 5:16 p.m.

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sbettani
Highly Voted 4 years, 5 months ago
"For all Virtual Machines that have two or more instances deployed across two or more Availability Zones in the same Azure region, we guarantee you will have Virtual Machine Connectivity to at least one instance at least 99.99% of the time." https://azure.microsoft.com/en-us/support/legal/sla/virtual-machines/v1_8/
upvoted 145 times
411
3 years, 11 months ago
2 VM in each AZ. Does that mean there will be 4 VMs at any given moment? Will that be failOVer only or sharing load also? Some cloud company recommend 3 and 3.
upvoted 6 times
Pass4IT
2 years, 2 months ago
Minimally, 1 VM in each AZ so in total 2 VM and 2 AZ. Refer to this YouTube tutorial: https://www.youtube.com/watch?v=5NMcM4zJPM4 Go to 9:37 , there is a diagram that shows how 99.99% is achieved.
upvoted 7 times
SAFM
7 months, 3 weeks ago
Very helpful, thank you!
upvoted 1 times
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m1nt1w0p4cc
2 years, 11 months ago
This is not any mom and pop cloud provider corporation... this is MS
upvoted 11 times
SyedAadRazaDevops
2 years, 9 months ago
hahahhahahahahhah
upvoted 2 times
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Kei_zzZ
2 years, 2 months ago
It's said 2 VMs with each one located in different availability zone
upvoted 1 times
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CarlosM
Highly Voted 4 years, 2 months ago
For all Virtual Machines that have two or more instances deployed across two or more Availability Zones in the same Azure region, we guarantee you will have Virtual Machine Connectivity to at least one instance at least 99.99% of the time. For all Virtual Machines that have two or more instances deployed in the same Availability Set, we guarantee you will have Virtual Machine Connectivity to at least one instance at least 99.95% of the time. For any Single Instance Virtual Machine using premium storage for all Operating System Disks and Data Disks, we guarantee you will have Virtual Machine Connectivity of at least 99.9%
upvoted 43 times
semauni
12 months ago
https://www.azure.cn/en-us/support/sla/virtual-machines/
upvoted 2 times
semauni
12 months ago
Woops I saw the .cn after I responded... (thanks Google for putting this as a first hit). Still, this is a comprehensive overview which should be the same for Azure in general.
upvoted 1 times
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Molota
Most Recent 12 months ago
2 VM and 2 AZ
upvoted 3 times
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Pa1theAchiever
1 year, 10 months ago
correct
upvoted 1 times
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raul4real73
1 year, 11 months ago
https://docs.microsoft.com/en-us/learn/modules/choose-azure-services-sla-lifecycle/4-design-application-meet-sla == "Deploying two or more instances of an Azure virtual machine across two or more availability zones raises the virtual machine SLA to 99.99 percent"
upvoted 1 times
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JKRowlings
2 years ago
For all Virtual Machines that have two or more instances deployed across two or more Availability Zones in the same Azure region, we guarantee you will have Virtual Machine Connectivity to at least one instance at least 99.99% of the time. https://azure.microsoft.com/en-us/support/legal/sla/virtual-machines/v1_9/
upvoted 1 times
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CodePro
2 years, 1 month ago
For all Virtual Machines that have two or more instances deployed across two or more Availability Zones in the same Azure region, we guarantee you will have Virtual Machine Connectivity to at least one instance at least 99.99% of the time. https://azure.microsoft.com/en-us/support/legal/sla/virtual-machines/v1_9/
upvoted 1 times
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namtn6
2 years, 2 months ago
i moved to azure from aws. In aws need minimum 1 instance to ensure always HA to cost-efficient
upvoted 1 times
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techgirl77
2 years, 4 months ago
Took the exam 12/30/21. This was the only resource I used to study. Thank you examtopics and all of you guys for your comments. Make sure to go through all the questions twice and you will pass. Good luck everyone!
upvoted 4 times
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Buruguduystunstugudunstuy
2 years, 6 months ago
Keywords = minimum number Answer: 2 VM and 2 AZ
upvoted 4 times
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Nassi
2 years, 8 months ago
Correct! https://azure.microsoft.com/fr-fr/support/legal/sla/virtual-machines/v1_9/
upvoted 1 times
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Gerardo1971
3 years ago
Correct answer
upvoted 2 times
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panal
3 years, 2 months ago
Answer Is Correct https://azure.microsoft.com/en-us/support/legal/sla/virtual-machines/v1_9/
upvoted 3 times
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panal
3 years, 3 months ago
It is correct https://azure.microsoft.com/en-us/support/legal/sla/virtual-machines/v1_9/
upvoted 1 times
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elvancedonzy
3 years, 3 months ago
Ans - 2 & 2 Ref - https://azure.microsoft.com/en-us/support/legal/sla/virtual-machines/v1_9/
upvoted 1 times
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nigeldmgriffith
3 years, 4 months ago
99.99% achieved by utilising a min. of 2VMs and 2Zones
upvoted 2 times
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agcertif
3 years, 5 months ago
Why not 3VMs 3AZs plz ?
upvoted 2 times
Sreeram1
3 years, 1 month ago
3 &3 can also do the job, but the question asked about minimum number. So the answer is 2&2. Hope clarifies it.
upvoted 4 times
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