Quick Answer
The answer is Azure Monitor. This is the correct choice because Azure Monitor provides a unified platform to collect and act on telemetry, and when a virtual machine is deallocated, that event is logged as an administrative operation in the Azure Activity Log. By creating an alert rule in Azure Monitor with the signal type set to 'Administrative', you can trigger an action group—such as sending an email or SMS—specifically when a VM is deallocated, ensuring your IT team is notified immediately. On the AZ-900 exam, this tests your understanding of Azure Monitor’s role in monitoring and alerting, often appearing as a scenario where you must distinguish it from services like Azure Service Health or Azure Advisor. A common trap is confusing Azure Monitor with Azure Security Center, but remember: Monitor handles operational alerts from the Activity Log, while Security Center focuses on threats. Memory tip: think “Monitor logs the action, then alerts the reaction.”
This AZ-900 practice question tests your understanding of describe azure management and governance. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company uses Azure and wants to ensure that their IT team receives alerts when virtual machines are deallocated unexpectedly. Which Azure service should they use to create a rule that triggers an action when a VM is deallocated?
Azure Service Health
Why wrong: Service Health alerts you about Azure service incidents, not resource-level events.
Azure Monitor
Azure Monitor with Activity Log alerts can notify you when VMs are deallocated.
Azure Advisor
Why wrong: Advisor provides best practice recommendations, not real-time alerts on resource changes.
Azure Policy
Why wrong: Policy enforces rules but does not send alerts on resource operations.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Azure Monitor
Azure Monitor is the correct service because it provides a unified platform for collecting, analyzing, and acting on telemetry from Azure resources. By creating an alert rule in Azure Monitor with a signal type of 'Administrative' (Azure Activity Log), you can trigger an action group (e.g., email, SMS, webhook) specifically when a virtual machine is deallocated, as this event is logged as an administrative operation in the Activity Log.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Azure Service Health
Why it's wrong here
Service Health alerts you about Azure service incidents, not resource-level events.
Azure Monitor
Why this is correct
Azure Monitor with Activity Log alerts can notify you when VMs are deallocated.
Related concept
Read the scenario before looking for a memorised answer.
Azure Advisor
Why it's wrong here
Advisor provides best practice recommendations, not real-time alerts on resource changes.
Azure Policy
Why it's wrong here
Policy enforces rules but does not send alerts on resource operations.
Common exam traps
The trap here is that candidates often confuse Azure Service Health (which monitors Azure platform health) with Azure Monitor (which monitors resource-level events), leading them to choose Option A for operational alerts like VM deallocation.
Detailed technical explanation
Under the hood, Azure Monitor alert rules for VM deallocation use the 'Activity Log' signal type, which captures all control-plane operations (e.g., Microsoft.Compute/virtualMachines/deallocate/action). The alert rule evaluates the Activity Log in near real-time (typically within 5 minutes) and triggers an action group, which can invoke webhooks, ITSM connectors, or Azure Functions for automated remediation. A subtle behavior is that deallocations initiated by Azure due to maintenance or spot VM eviction also appear in the Activity Log, so you can differentiate them using the 'Status' and 'Initiated by' fields in the alert rule's condition.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
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FAQ
Describe Azure management and governance — This question tests Describe Azure management and governance — Read the scenario before looking for a memorised answer..
The correct answer is: Azure Monitor — Azure Monitor is the correct service because it provides a unified platform for collecting, analyzing, and acting on telemetry from Azure resources. By creating an alert rule in Azure Monitor with a signal type of 'Administrative' (Azure Activity Log), you can trigger an action group (e.g., email, SMS, webhook) specifically when a virtual machine is deallocated, as this event is logged as an administrative operation in the Activity Log.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
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