Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A company runs a mission-critical application on Azure virtual machines. The application must remain available even if an entire Azure datacenter in a region experiences a complete outage (e.g., power failure). The company wants all VMs to be located in the same Azure region to minimize latency. Which Azure feature should the company use to deploy 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
Availability Set
An Availability Set protects against rack-level failures within a single datacenter by distributing VMs across different fault domains and update domains. It does not protect against an entire datacenter outage.
B
Best answer
Availability Zone
Availability Zones are physically separate datacenters within an Azure region, each with its own independent power, cooling, and networking. Deploying VMs across multiple zones protects against a complete datacenter failure while keeping resources in the same region.
C
Distractor review
Resource Group
A Resource Group is a logical container for resources that share the same lifecycle, permissions, and policies. It does not provide any infrastructure-level availability or protection against datacenter outages.
D
Distractor review
Proximity Placement Group
A Proximity Placement Group is used to colocate VMs in the same datacenter to minimize network latency. This reduces availability by placing VMs on the same infrastructure, making them vulnerable to a single datacenter failure.
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.
Related practice questions
Related AZ-900 practice-question pages
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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 developer is building a serverless application that requires integration with an on-premises SQL Server database for real-time data processing. The on-premises network is connected to Azure via a site-to-site VPN. Which Azure service would allow the function to securely access the on-premises database without exposing it to the public internet?
Question 2
A solutions architect is designing a storage solution for a large media company. The company needs to store video files that are accessed infrequently but must be retained for several years for compliance. Which two Azure storage options meet these requirements? (Select two.)
Question 3
A company deploys a multi-tier application using Azure virtual machines. The web tier VMs must be evenly distributed across two distinct data centers within an Azure region to avoid a single point of failure from an infrastructure outage. Which Azure construct should they use to meet this requirement?
Question 4
A company wants to enforce a set of security policies across all their Azure subscriptions. They have created several individual policy definitions. Which Azure construct should they use to group these policies together and assign them as a single package?
Question 5
A company deploys a line-of-business application on an Azure virtual machine. The IT team wants to ensure the application remains secure. According to the shared responsibility model, which of the following security tasks is the sole responsibility of the customer (the company)?
Question 6
A company develops a web API that runs on Azure App Service. The development team wants to deploy a new version of the API to a staging environment, run integration tests against it, and then gradually shift production traffic to the new version. If any issues are detected, they want to immediately roll back to the previous version without redeploying. Which Azure App Service feature should the team use to meet these requirements?
FAQ
Questions learners often ask
What does this AZ-900 question test?
Read the scenario before looking for a memorised answer.
What is the correct answer to this question?
The correct answer is: Availability Zone — To protect against an entire datacenter outage within a region, you need to deploy VMs across Availability Zones. Availability Zones are unique physical locations with independent power, cooling, and networking. Deploying VMs across two or more zones within the same region ensures that if one datacenter fails, the application continues to run from another zone. Azure SLA for VMs deployed across two or more availability zones is 99.99%.
What should I do if I get this AZ-900 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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