AZ-900 Describe Azure management and governance Practice Question
A company wants to monitor the performance of their Azure VMs and receive alerts when CPU usage exceeds 90%. Which Azure service should they use?
⚠ Common exam trap
Watch out — candidates often confuse Azure Monitor with Azure Security Center, thinking both handle alerts, but Security Center is strictly for security-related alerts (e.g., vulnerabilities, threats) and not for performance metrics like CPU usage.
Answer choices
Why each option matters
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 comprehensive solution for collecting, analyzing, and acting on telemetry from Azure resources, including VMs. It includes metrics like CPU percentage and allows you to configure metric alerts that trigger when a threshold (e.g., 90% CPU usage) is exceeded. This directly meets the requirement for performance monitoring and alerting.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Azure Monitor
Why this is correct
Azure Monitor is Azure's unified telemetry and observability service. For virtual machines, it captures platform-level metrics (CPU, disk, network) via the Azure platform, and can additionally collect guest OS performance counters through the Log Analytics agent. Alerts can be defined using metric thresholds (e.g., CPU > 90% for 5 minutes) or log queries, making it the correct service for performance monitoring and alerting.
- ✗
Azure Policy
Why it's wrong here
Azure Policy is a governance and compliance engine that enforces rules over Azure resource configurations, such as allowed VM sizes, location constraints, or the presence of required diagnostic settings. It evaluates resource properties and can trigger remediation for non-compliant deployments, but it does not collect time-series telemetry from running VMs. Its scope is configuration drift and regulatory compliance, not runtime performance measurement or alerting on CPU/memory usage.
When this WOULD be correct
A company needs to ensure that all VMs are deployed only in specific regions or have mandatory tags. Azure Policy would be the correct service to enforce these organizational rules.
- ✗
Azure Security Center
Why it's wrong here
Azure Security Center (now integrated into Microsoft Defender for Cloud) is designed to improve the security posture of workloads by providing security recommendations, vulnerability assessments, and threat detection. While it may use agents to collect security-relevant data, its alerts and findings focus on vulnerabilities, network security weaknesses, and malicious activity, not on performance degradation or resource saturation. Therefore, it does not fulfill the requirement to monitor VM performance metrics.
When this WOULD be correct
A company wants to assess the security configuration of their Azure VMs and receive recommendations to improve their security posture. Azure Security Center would be the correct service to use.
- ✗
Azure Cost Management
Why it's wrong here
Azure Cost Management is a financial governance tool that tracks, analyzes, and forecasts subscription and resource spending. It can generate budgets and send alerts when costs exceed defined limits, but it has no telemetry pipeline for VM performance indicators such as CPU, memory, or disk latency. Its purpose is cost optimization and billing accountability, not real-time operational health monitoring.
When this WOULD be correct
A question asks: 'A company wants to track and optimize their Azure spending, and receive alerts when costs exceed a budget. Which service should they use?'
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The AZ-900 exam frequently reuses these exact scenarios with slightly different constraints.
✓Azure MonitorCorrect answer▾
Why this is correct
Azure Monitor is Azure's unified telemetry and observability service. For virtual machines, it captures platform-level metrics (CPU, disk, network) via the Azure platform, and can additionally collect guest OS performance counters through the Log Analytics agent. Alerts can be defined using metric thresholds (e.g., CPU > 90% for 5 minutes) or log queries, making it the correct service for performance monitoring and alerting.
✗Azure PolicyWrong answer — click to see why▾
Why this is wrong here
Azure Policy is used to enforce compliance rules and governance across Azure resources, not to monitor performance metrics or set alerts on CPU usage.
★ When this WOULD be the correct answer
A company needs to ensure that all VMs are deployed only in specific regions or have mandatory tags. Azure Policy would be the correct service to enforce these organizational rules.
Why candidates choose this
Candidates may confuse policy enforcement with monitoring, thinking that policies can trigger alerts when conditions are violated, but Azure Policy does not handle metric-based alerts.
✗Azure Security CenterWrong answer — click to see why▾
Why this is wrong here
Azure Security Center is a unified infrastructure security management system that strengthens the security posture of data centers and provides advanced threat protection across hybrid workloads. It does not provide performance monitoring or alerting based on CPU usage metrics.
★ When this WOULD be the correct answer
A company wants to assess the security configuration of their Azure VMs and receive recommendations to improve their security posture. Azure Security Center would be the correct service to use.
Why candidates choose this
Candidates may confuse Security Center with monitoring capabilities because it provides security alerts and recommendations, leading them to think it can also handle performance-based alerts.
✗Azure Cost ManagementWrong answer — click to see why▾
Why this is wrong here
Azure Cost Management focuses on monitoring and optimizing cloud spending, not on performance metrics like CPU usage or setting alerts based on resource performance thresholds.
★ When this WOULD be the correct answer
A question asks: 'A company wants to track and optimize their Azure spending, and receive alerts when costs exceed a budget. Which service should they use?'
Why candidates choose this
Candidates may confuse cost monitoring with performance monitoring, or assume that any monitoring service can handle alerts for resource usage.
Analysis generated from the official AZ-900blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Go deeper
Related to this question
Learn chapter
Azure Cost Management and Billing
Key term
Azure Monitor
Azure Monitor is a cloud service that collects, analyzes, and acts on telemetry data from your Azure and on-premises resources to help you understand performance and availability.
Key term
Trigger
In Azure data services, a trigger is a predefined automatic action that initiates a process when a specific event occurs, such as data arriving or a schedule being met.
About these practice questions
This AZ-900 question is part of Courseiva's 981-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This AZ-900 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AZ-900 exam.