Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A stateless API runs on Azure VMs and experiences unpredictable traffic spikes during the day. The administrator must automatically add or remove identical VM instances based on CPU usage, and the platform should distribute instances across fault domains without manual placement. What should be used?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
Availability set
An availability set improves resiliency, but it does not automatically scale VM count based on demand.
B
Best answer
Virtual machine scale set
A virtual machine scale set supports automatic instance scaling and distributes instances for better platform resilience.
C
Distractor review
Availability zone
A zone choice improves datacenter resilience, but it does not provide automatic scale out and scale in behavior.
D
Distractor review
Proximity placement group
A proximity placement group reduces latency between resources, but it is not an autoscaling feature.
Common exam trap
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Technical deep dive
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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.
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A route table contains these entries: 10.0.0.0/8 with next hop Virtual appliance, and 10.1.1.0/24 with next hop Virtual network gateway. Which next hop will Azure use for traffic to 10.1.1.5?
Question 2
You are deploying a stateless web application on Azure virtual machines. The solution must automatically add and remove instances based on CPU demand and allow all instances to be managed as one logical group. Which Azure compute feature should you deploy?
Question 3
You are deploying a Windows Server VM for an internal app. The VM must support Secure Boot and vTPM later, its OS disk must survive host moves, and the team wants the lowest-cost managed disk tier that still behaves like a normal writable OS disk. Which two choices should you make? Select two.
Question 4
You need to deploy several identical virtual machines and ensure that the failure of a single Azure host does not affect all of them. Which feature should you use?
Question 5
You need to connect VNet-Hub and VNet-Spoke so that resources in both virtual networks can communicate privately over the Microsoft backbone. Both virtual networks are in the same region. What should you configure?
Question 6
You need to create a storage account that provides the lowest-cost redundant storage for non-critical data and only needs protection against local disk or server failure within a single datacenter. Which redundancy option should you choose?
FAQ
Questions learners often ask
What does this AZ-104 question test?
Read the scenario before looking for a memorised answer.
What is the correct answer to this question?
The correct answer is: Virtual machine scale set — A virtual machine scale set is the best fit because the workload needs automatic horizontal scaling with identical VM instances. Scale sets can increase or decrease instance count based on metrics such as CPU and can place instances for resilience across fault domains, and optionally zones when configured. Availability sets improve availability but do not handle autoscaling. Availability zones address datacenter failure isolation, while proximity placement groups are about low latency, not dynamic capacity management. Why others are wrong: An availability set helps with maintenance and host failures but does not add or remove instances automatically. An availability zone addresses physical separation, not elastic scaling. A proximity placement group can improve performance between resources, but it does not manage capacity or distribute instances for scale-out demand.
What should I do if I get this AZ-104 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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