Question 1easymultiple choice
Full question →easymultiple choiceObjective-mapped
A line-of-business application must keep running even if one datacenter in an Azure region has an outage. Which deployment option should you choose for the VMs?
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
An availability set
An availability set protects against planned maintenance and some hardware failures, but not a full datacenter outage.
B
Distractor review
A single virtual machine with Premium SSD
A single VM does not provide redundancy, so it cannot survive a datacenter outage by itself.
C
Best answer
Availability zones
Availability zones place VMs in separate physical datacenters within the same region. That gives the workload protection from a datacenter-level failure, which is stronger than an availability set. If one zone goes down, VMs in the other zones can continue serving traffic when the application is designed for zone-aware redundancy.
D
Distractor review
A proximity placement group
A proximity placement group reduces latency between resources, but it does not protect against datacenter outages.
Common exam trap
Common exam trap: OSPF can fail even when IP connectivity looks correct
OSPF neighbour formation depends on matching areas, timers, network type, authentication and passive-interface behaviour. Do not choose an answer only because the devices can ping.
Technical deep dive
How to think about this question
OSPF questions usually test the details that control adjacency and route selection. Read the neighbour state, area, router ID and interface configuration before deciding what is wrong.
KKey Concepts to Remember
- OSPF neighbours must agree on key parameters.
- Router ID selection can affect neighbour relationships and LSDB output.
- OSPF cost influences the preferred path.
- A route can appear in OSPF information but not become the installed route.
TExam Day Tips
- Check area mismatch first when OSPF adjacency fails.
- Review passive interfaces when a network is advertised but no neighbour forms.
- Use show ip ospf neighbor and show ip route clues carefully.
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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?
OSPF neighbours must agree on key parameters.
What is the correct answer to this question?
The correct answer is: Availability zones — Availability zones are the correct answer because they provide datacenter-level isolation inside a region. Each zone is physically separate, so placing VMs across zones helps the application survive a failure that affects one datacenter. An availability set is useful for host maintenance and localized hardware issues, but it does not span independent datacenters, which is the requirement here. Why others are wrong: A single VM has no redundancy. An availability set improves resilience within one datacenter area, but it does not meet the requirement for datacenter outage protection. A proximity placement group is about performance placement, not high availability. For a full datacenter failure scenario, zones are the right Azure compute option.
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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