Question 1hardmulti select
Full question →hardmulti selectObjective-mapped
A build agent VM is recreated from image every night. The OS can be lost on reimage, but build caches and artifacts must persist across rebuilds. The team also wants the cheapest OS storage option that supports this pattern. Which two choices should you make? Select two.
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
Best answer
Use an ephemeral OS disk.
An ephemeral OS disk is the cheapest OS storage choice for a VM that can be recreated from image often. It is acceptable here because the scenario explicitly says the OS can be lost on reimage.
B
Best answer
Place build caches and artifacts on a separate managed data disk.
A separate managed data disk provides persistence for build caches and artifacts across nightly rebuilds. That keeps the stateful pieces safe even though the OS disk itself is disposable.
C
Distractor review
Use a Premium SSD OS disk so the reimage is preserved.
A premium OS disk is not what preserves the VM during reimage, and it is more expensive than necessary. The scenario specifically allows the OS disk to be lost.
D
Distractor review
Store the caches only on the temporary resource disk.
Temporary resource disks are not durable and are cleared during host changes or deallocation events. They are unsuitable for data that must persist across rebuilds.
E
Distractor review
Use an availability set to make the OS disk persistent.
Availability sets improve placement resilience, but they do not turn the OS disk into durable persistent storage. Persistence is provided by the disk type, not by the availability feature.
Common exam trap
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Technical deep dive
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
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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?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: Use an ephemeral OS disk. — An ephemeral OS disk is the cheapest suitable choice when the VM is rebuilt from image regularly and losing the OS disk is acceptable. To preserve build caches and artifacts, you must store them on a separate managed data disk rather than on temporary storage. This combination matches the lifecycle of a disposable build agent while keeping stateful build data intact. Why others are wrong: Premium OS storage is unnecessary because the OS can be discarded on reimage. Temporary resource disks are not persistent enough for build caches. Availability sets help with fault tolerance, but they do not provide storage persistence. The requirement is explicitly a disposable OS with persistent artifacts, so the ephemeral OS disk plus managed data disk is the correct design.
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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