The answer is Azure Resource Graph. This tool is the correct choice because it is purpose-built for querying resources across subscriptions, resource groups, and resource types using the Kusto Query Language (KQL), allowing you to filter virtual machines by the tag 'Environment:Production' and compare the 'createdTime' property to a date six months ago in a single, complex query that spans your entire tenant. On the AZ-900 exam, this question tests your understanding of which Azure service handles cross-subscription, multi-resource queries versus tools like Azure Monitor or Resource Explorer, which are more limited in scope. A common trap is confusing Azure Resource Graph with Azure Resource Manager, but remember that Resource Graph is for exploration and discovery, not management. Memory tip: think "Graph" for "global query"—it maps relationships across all your subscriptions at once.
AZ-900 Describe Azure management and governance Practice Question
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 needs to find all virtual machines that have the tag 'Environment:Production' and were created more than 6 months ago. They want to run a complex query across all subscriptions in their tenant. Which Azure tool should they use?
Correct. Azure Resource Graph provides a powerful query language to search, filter, and aggregate resources across subscriptions based on properties like tags and creation date.
B
Azure CLI
Why wrong: Incorrect. While Azure CLI can be used to query resources, it is not designed for complex cross-subscription queries; Resource Graph is more efficient.
C
Azure PowerShell
Why wrong: Incorrect. Similar to CLI, PowerShell can query resources but Resource Graph better supports complex cross-subscription queries.
D
Azure Cost Management
Why wrong: Incorrect. Cost Management focuses on cost analysis, not on querying resource properties like creation dates.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Azure Resource Graph
Azure Resource Graph is the correct tool because it is designed to efficiently query across multiple subscriptions, resource groups, and resource types using the Kusto Query Language (KQL). It can filter virtual machines by the tag 'Environment:Production' and compare the 'createdTime' property to a date six months ago, all in a single, complex query that spans the entire tenant.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 Resource Graph
Why this is correct
Correct. Azure Resource Graph provides a powerful query language to search, filter, and aggregate resources across subscriptions based on properties like tags and creation date.
Related concept
Read the scenario before looking for a memorised answer.
✗
Azure CLI
Why it's wrong here
Incorrect. While Azure CLI can be used to query resources, it is not designed for complex cross-subscription queries; Resource Graph is more efficient.
✗
Azure PowerShell
Why it's wrong here
Incorrect. Similar to CLI, PowerShell can query resources but Resource Graph better supports complex cross-subscription queries.
✗
Azure Cost Management
Why it's wrong here
Incorrect. Cost Management focuses on cost analysis, not on querying resource properties like creation dates.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Azure Resource Graph with Azure CLI or PowerShell because all three can query resources, but only Resource Graph is purpose-built for complex, cross-subscription queries using KQL, while the others are imperative tools that require manual iteration and lack native query optimization.
Trap categories for this question
Similar concept trap
Incorrect. Similar to CLI, PowerShell can query resources but Resource Graph better supports complex cross-subscription queries.
Detailed technical explanation
How to think about this question
Azure Resource Graph uses the Resource Graph API, which leverages a distributed query engine that indexes Azure resource properties (including tags and timestamps) into a scalable data store. This allows queries like 'where type =~ 'microsoft.compute/virtualmachines' and tags.Environment =~ 'Production' and properties.timeCreated < ago(180d)' to be executed in seconds across thousands of subscriptions, whereas CLI or PowerShell would require multiple API calls and client-side filtering, introducing latency and potential throttling issues.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-900 question in full detail.
Describe Azure management and governance — This question tests Describe Azure management and governance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Azure Resource Graph — Azure Resource Graph is the correct tool because it is designed to efficiently query across multiple subscriptions, resource groups, and resource types using the Kusto Query Language (KQL). It can filter virtual machines by the tag 'Environment:Production' and compare the 'createdTime' property to a date six months ago, all in a single, complex query that spans the entire tenant.
What should I do if I get this AZ-900 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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