Fundamental
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Fundamental
Prepare and test your skills
Charting VM Performance with Metrics Explorer
Free sample question, answered and explained below. The AZ-900 Microsoft Azure Fundamentals Exam practice bank has 688 more like it. Try 10 free: instant score, no account.
An administrator is managing several production virtual machines and needs to investigate a sudden performance slowdown. The administrator wants to use an interactive charting tool directly within the Azure portal to plot numerical performance telemetry, such as CPU utilization and memory consumption, over the past 24 hours to analyze spikes and identify trends.
Which tool in the Azure portal should the administrator use to plot this numerical performance data?
Explanations
Metrics explorer
Metrics explorer
What Metrics Explorer Is
Metrics explorer is a dedicated visualization tool integrated directly into the Azure portal as part of Azure Monitor. It is designed to plot, analyze, and correlate numerical time-series performance data emitted by cloud resources.
How It Meets the Requirements
- Numerical Telemetry Visualization: It specializes in rendering lightweight, numerical data points (platform metrics) such as CPU percentage, memory usage, and network traffic over defined intervals.
- Interactive Charting: The administrator can easily customize time ranges (such as the last 24 hours), apply granular time aggregations (Average, Maximum, Sum), and visually identify spikes or dips in real time.
- Trend Analysis: It allows administrators to overlay multiple metrics on a single chart or split data across dimensions to isolate bottlenecks on virtual machines.
Key Advantages and Capabilities
- Out-of-the-Box Availability: Automatically collects platform metrics without requiring initial agent configuration for standard host-level metrics.
- Near Real-Time Telemetry: Metrics are stored in a lightweight time-series database supporting rapid visual rendering and fast evaluation.
- Dimension Filtering and Splitting: Enables deep analysis by filtering specific dimensions or comparing multiple resource instances side-by-side.
- Direct Alert Rule Creation: Allows administrators to configure metric alert rules directly from the chart interface when thresholds are breached.
Why This Is Optimal
Metrics explorer is specifically built for charting and analyzing numerical performance metrics within the portal UI, making it the most direct and effective tool for diagnosing resource utilization issues compared to log-query tools or subscription audit services.
Azure Advisor
Azure Advisor
What Azure Advisor Is
Azure Advisor is a built-in personalized cloud consultant that analyzes resource configurations and usage telemetry to provide proactive best practice recommendations.
Why It Doesn't Meet the Requirement
Azure Advisor evaluates resource configurations against best practices across five pillars: Cost, Security, Reliability, Performance, and Operational Excellence. However, it is not an interactive data plotting tool and does not allow users to graph live numerical performance counters over custom time periods.
Key Characteristics and Limitations
- Recommendation Engine: Highlights actionable guidance (such as resizing underutilized VMs or purchasing reserved instances).
- High-Level Summary: Displays recommendations and status summaries rather than granular, interactive performance graphs.
- Periodic Evaluation: Evaluates resources in the background rather than providing an on-demand plotting workspace for troubleshooting active spikes.
This Answer Would Be Correct If
The administrator wanted high-level advice on optimizing costs or rightsizing underutilized virtual machines based on long-term historical patterns.
Additional Context
Recommendations from Azure Advisor may prompt an administrator to inspect metrics, but the actual investigation and visualization of performance data occur in Metrics explorer.
Azure Network Watcher
Azure Network Watcher
What Azure Network Watcher Is
Azure Network Watcher is a regional service that provides specialized tools to monitor, diagnose, and view network-level health and traffic across Azure Infrastructure as a Service (IaaS) resources.
Why It Doesn't Meet the Requirement
Network Watcher focuses specifically on networking scenarios, such as IP flow verify, packet capturing, next hop routing, and NSG flow logs. It does not plot general compute performance metrics like host CPU utilization or guest memory consumption for virtual machines.
Key Characteristics and Limitations
- Network Diagnostic Scope: Designed for diagnosing connectivity issues, routing errors, and security group filtering.
- Specialized Packet Capture: Enables variable packet captures on virtual machines to diagnose protocol issues rather than tracking utilization trends.
- Topology Mapping: Visualizes network relationships rather than general workload performance time series.
This Answer Would Be Correct If
The administrator needed to capture raw packet data or verify why a specific network security group rule was blocking traffic to a virtual machine.
Additional Context
Although network metrics can be analyzed in Metrics explorer, specialized network diagnostic troubleshooting and traffic analysis are delegated to Azure Network Watcher.
Azure Activity log
Azure Activity log
What Azure Activity Log Is
The Azure Activity log is a platform logging feature that records subscription-level events and management operations (control plane events) executed on Azure resources.
Why It Doesn't Meet the Requirement
The Activity log tracks who did what, when, and on which resource—such as creating a new resource, modifying a network configuration, or restarting a virtual machine. It does not record continuous, numerical performance metrics like real-time CPU percentage or memory usage, nor does it provide performance graphing tools for time-series utilization.
Key Characteristics and Limitations
- Auditing Focus: Captures administrative and operational actions initiated by users or Azure services.
- Event-Driven: Generates entries only when an administrative operation or status change occurs.
- Data Retention: Retains event records for 90 days in the portal by default without providing numerical charting capabilities.
This Answer Would Be Correct If
The administrator needed to find out which team member stopped or modified the virtual machine configuration during an incident.
Additional Context
While the Activity log is essential for governance and security auditing, diagnosing performance bottlenecks requires Azure Monitor platform metrics viewed through Metrics explorer.
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