The answer is Availability Zones. This is the correct choice because Availability Zones are physically separate datacenters within an Azure region, each with independent power, cooling, and networking, so deploying your virtual machines across two or more zones ensures that if one datacenter fails, the application continues running in the other zone. On the AZ-104 exam, this concept tests your understanding of high availability within a single region versus disaster recovery across regions, and a common trap is confusing Availability Zones with Availability Sets—remember that zones protect against datacenter failure, while sets protect against hardware failure within a single datacenter. For a quick memory tip, think of zones as separate buildings and sets as different racks in the same building.
AZ-104 Deploy and Manage Azure Compute Practice Question
This AZ-104 practice question tests your understanding of deploy and manage azure compute. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
You plan to run a web application on Azure virtual machines and need protection against a single datacenter failure within an Azure region. Which deployment option should you use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Availability zones
Availability Zones are physically separate datacenters within an Azure region, each with independent power, cooling, and networking. Deploying your VMs across two or more zones protects against a single datacenter failure because if one zone goes down, the application continues running in the other zone. This meets the requirement for datacenter-level fault tolerance within a single region.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
An availability set only
Why it's wrong here
Availability sets do not provide the same datacenter-level separation as zones.
✓
Availability zones
Why this is correct
Availability zones provide resilience against the failure of a single datacenter in a region.
Related concept
Read the scenario before looking for a memorised answer.
✗
A proximity placement group
Why it's wrong here
A proximity placement group keeps resources close together for latency, not resilience.
✗
A single VM with premium SSD
Why it's wrong here
This does not provide redundancy against datacenter failure.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse availability sets (which protect against rack-level failures within one datacenter) with availability zones (which protect against full datacenter failures), leading them to select the cheaper or more familiar option without recognizing the critical difference in fault domain scope.
Detailed technical explanation
How to think about this question
Availability Zones are unique physical locations within an Azure region, each with one or more datacenters. When you deploy VMs across zones, you use zone-redundant storage (ZRS) for managed disks to ensure data survives a zone failure. Under the hood, Azure uses a distributed control plane to manage zone-aware placement, and you must explicitly configure the VM's zone property at creation time—it cannot be changed later. In a real-world scenario, combining Availability Zones with a load balancer (e.g., Azure Standard Load Balancer) provides both high availability and traffic distribution across zones.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-104 question in full detail.
Deploy and Manage Azure Compute — This question tests Deploy and Manage Azure Compute — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Availability zones — Availability Zones are physically separate datacenters within an Azure region, each with independent power, cooling, and networking. Deploying your VMs across two or more zones protects against a single datacenter failure because if one zone goes down, the application continues running in the other zone. This meets the requirement for datacenter-level fault tolerance within a single region.
What should I do if I get this AZ-104 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A line-of-business app requires protection against a datacenter outage in a region that supports zones. You want the strongest placement resilience available for the VMs. What should you choose?
easy
A.Availability set
✓ B.Availability zone
C.Virtual machine scale set
D.Resource lock
Why B: Availability zones are physically separate datacenters within an Azure region, each with independent power, cooling, and networking. Deploying VMs across zones provides the strongest resilience against a datacenter outage because if one zone fails, the other zones remain operational. This is the highest level of protection available within a single region for IaaS VMs.
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This AZ-104 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AZ-104 exam.
Question Discussion
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