Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A company has a policy that every Azure virtual machine must have the Azure Monitor Agent installed and configured to send metrics to a central Log Analytics workspace. To enforce this requirement without relying on manual user action, the governance team wants to automatically deploy the agent to any existing or new VM that is missing it. They also need to generate a compliance report showing any VMs where the installation failed. Which Azure Policy effect should the team use to meet these requirements?
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
DeployIfNotExists
Correct. DeployIfNotExists evaluates resources after creation and automatically deploys a defined resource (such as a VM extension) if the required resource is not present. It also generates compliance results, including failures.
B
Distractor review
AuditIfNotExists
Incorrect. AuditIfNotExists would only check for the presence of the agent and mark the VM as non-compliant if missing, but it would not automatically deploy the agent. The scenario requires automatic remediation, not just auditing.
C
Distractor review
Deny
Incorrect. The Deny effect prevents the creation of a resource that does not meet the policy condition. It would block new VMs without the agent, but it would not deploy the agent to existing VMs, nor does it provide automatic remediation for non-compliance.
D
Distractor review
Modify
Incorrect. The Modify effect is used to add, update, or remove properties or tags on the same resource being evaluated. Deploying a VM extension is a separate resource creation, which is not handled by Modify; DeployIfNotExists is designed for deploying additional resources.
Common exam trap
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Technical deep dive
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
- Standard ACLs match source addresses.
- Extended ACLs can match source, destination, protocol and ports.
- The first matching ACL entry is used.
- There is usually an implicit deny at the end.
TExam Day Tips
- Check inbound versus outbound direction.
- Read the ACL from top to bottom.
- Look for a broader permit or deny above the intended line.
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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?
Standard ACLs match source addresses.
What is the correct answer to this question?
The correct answer is: DeployIfNotExists — Azure Policy can automatically remediate non-compliant resources using the 'DeployIfNotExists' effect. This effect evaluates resources after creation and deploys a defined resource template (in this case, the Azure Monitor Agent VM extension) if the required resource does not exist. It also logs compliance results for reporting. The 'AuditIfNotExists' effect would only report non-compliance without remediation. The 'Deny' effect would block creation of VMs without the agent but would not fix existing ones. The 'Modify' effect is used to change properties on the same resource, but deploying a VM extension is a separate resource, so DeployIfNotExists is appropriate.
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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