This AZ-104 practice question tests your understanding of monitor and maintain azure resources. 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.
You need to collect Windows event logs and performance counters from multiple Azure virtual machines and query the data by using Kusto Query Language. Which Azure resource should you use?
A Log Analytics workspace
Log Analytics workspaces store and enable KQL queries over collected monitoring data.
A Recovery Services vault
Why wrong: Recovery Services vaults are for backup and recovery.
Azure Network Watcher
Why wrong: Network Watcher is focused on network diagnostics rather than centralized VM log analytics.
A load balancer
Why wrong: A load balancer distributes traffic and does not store log data for KQL queries.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
A Log Analytics workspace
A Log Analytics workspace is the correct Azure resource for collecting Windows event logs and performance counters from Azure VMs and querying them using Kusto Query Language (KQL). It serves as the central repository where diagnostic data is ingested via the Azure Diagnostics extension or the Log Analytics agent, enabling rich log analytics and custom KQL queries.
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.
A Log Analytics workspace
Why this is correct
Log Analytics workspaces store and enable KQL queries over collected monitoring data.
Related concept
Read the scenario before looking for a memorised answer.
A Recovery Services vault
Why it's wrong here
Recovery Services vaults are for backup and recovery.
Azure Network Watcher
Why it's wrong here
Network Watcher is focused on network diagnostics rather than centralized VM log analytics.
A load balancer
Why it's wrong here
A load balancer distributes traffic and does not store log data for KQL queries.
Common exam traps
The trap here is that candidates often confuse a Log Analytics workspace with Azure Monitor itself, but the workspace is the specific resource that stores and queries the data, while Azure Monitor is the overarching service; the question explicitly asks for the resource that collects and queries the data, which is the workspace.
Detailed technical explanation
Under the hood, the Log Analytics workspace uses a dedicated data ingestion pipeline where agents (e.g., the Log Analytics agent or Azure Monitor Agent) send data to a workspace endpoint over HTTPS. The data is stored in a columnar store optimized for KQL queries, and performance counters are collected at configurable intervals (e.g., every 60 seconds). A real-world scenario is using KQL to correlate CPU spikes from performance counters with specific Windows Event IDs (e.g., 4625 for failed logins) to troubleshoot security incidents.
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
Monitor and Maintain Azure Resources — This question tests Monitor and Maintain Azure Resources — Read the scenario before looking for a memorised answer..
The correct answer is: A Log Analytics workspace — A Log Analytics workspace is the correct Azure resource for collecting Windows event logs and performance counters from Azure VMs and querying them using Kusto Query Language (KQL). It serves as the central repository where diagnostic data is ingested via the Azure Diagnostics extension or the Log Analytics agent, enabling rich log analytics and custom KQL queries.
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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