Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A stateless web application is hosted on an Azure virtual machine scale set. Traffic is predictable: CPU usage stays below 20% overnight, then rises above 70% during business hours. The administrator wants the instance count to increase automatically when average CPU stays high for 10 minutes and to decrease after demand drops. What should be configured?
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
A proximity placement group for the scale set instances.
This affects placement and latency, not automatic instance count changes.
B
Distractor review
Manual scale operations only.
Manual scaling cannot react automatically to the changing CPU pattern described.
C
Best answer
Autoscale rules on the virtual machine scale set.
Autoscale rules can add or remove VMSS instances based on CPU thresholds and time conditions.
D
Distractor review
An availability set with three update domains.
An availability set improves maintenance resilience but does not provide dynamic scaling.
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: Autoscale rules on the virtual machine scale set. — Autoscale rules on the VM scale set are the right fit because they let Azure adjust capacity automatically based on workload signals such as average CPU. You can define a scale-out threshold, a duration such as 10 minutes, a cooldown period, and a scale-in rule for when demand drops. That gives the app enough capacity during busy hours without paying for unused instances overnight. Why others are wrong: A proximity placement group does not change the number of running instances. Manual scaling would require constant administrator intervention and would not meet the automatic response requirement. An availability set is a resilience feature, not a scaling mechanism, so it does not address changing demand at all.
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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