- A
Availability set
An availability set spreads VMs across fault domains and update domains within a datacenter. This reduces the chance that all instances are affected by the same host maintenance event. It is the correct choice when the goal is host-level resilience rather than protection against an entire datacenter outage.
- B
Availability zone
Why wrong: Availability zones are used to protect against a full datacenter or zone failure, which is more than the requirement asks for.
- C
Azure Load Balancer
Why wrong: A load balancer distributes traffic, but it does not place VMs into different maintenance or fault domains.
- D
Virtual machine scale set
Why wrong: A scale set helps with scaling and instance management, but it is not the simplest answer for host-maintenance protection only.
AZ-104 Deploy and Manage Azure Compute Practice Question
This AZ-104 practice question tests your understanding of deploy and manage azure compute. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
Two application VMs run in the same Azure region. The business wants to reduce the chance that both VMs are rebooted during planned host maintenance, but a datacenter outage is not part of the requirement. What should the administrator configure?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Availability set
An availability set ensures that VMs are placed on different fault domains and update domains within the same Azure datacenter. This configuration guarantees that during planned host maintenance, only one update domain is rebooted at a time, reducing the chance that both VMs are rebooted simultaneously. Since the requirement explicitly excludes a datacenter outage, an availability set is the correct choice to protect against planned maintenance events.
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.
- ✓
Availability set
Why this is correct
An availability set spreads VMs across fault domains and update domains within a datacenter. This reduces the chance that all instances are affected by the same host maintenance event. It is the correct choice when the goal is host-level resilience rather than protection against an entire datacenter outage.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Availability zone
Why it's wrong here
Availability zones are used to protect against a full datacenter or zone failure, which is more than the requirement asks for.
- ✗
Azure Load Balancer
Why it's wrong here
A load balancer distributes traffic, but it does not place VMs into different maintenance or fault domains.
- ✗
Virtual machine scale set
Why it's wrong here
A scale set helps with scaling and instance management, but it is not the simplest answer for host-maintenance protection only.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse availability zones (which protect against datacenter outages) with availability sets (which protect against planned maintenance and hardware failures within a single datacenter), leading them to select availability zones even when the requirement explicitly excludes datacenter-level failures.
Detailed technical explanation
How to think about this question
An availability set groups VMs into up to 3 fault domains (shared power and network) and up to 20 update domains (groups rebooted sequentially during maintenance). Azure guarantees that only one update domain is rebooted at a time during planned maintenance, ensuring that VMs in different update domains remain available. This is achieved by the Azure fabric controller scheduling updates in a rolling manner across update domains, which is invisible to the VM but critical for SLA compliance (e.g., 99.95% for multi-VM availability sets).
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.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this AZ-104 question test?
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 set — An availability set ensures that VMs are placed on different fault domains and update domains within the same Azure datacenter. This configuration guarantees that during planned host maintenance, only one update domain is rebooted at a time, reducing the chance that both VMs are rebooted simultaneously. Since the requirement explicitly excludes a datacenter outage, an availability set is the correct choice to protect against planned maintenance events.
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 →
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Last reviewed: Jun 11, 2026
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.
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