The answer is Azure Cost Management + Billing. This tool is the correct choice because it offers built-in cost analysis capabilities that allow you to group costs by custom tag keys, such as 'Project', and simultaneously filter for or identify untagged resources, directly meeting the finance team’s dual requirement of tracking spending per project while flagging resources that lack tags. On the Microsoft Azure Fundamentals AZ-900 exam, this scenario tests your understanding of how cost governance and reporting are handled natively in Azure, often appearing as a question that contrasts Cost Management with other tools like Azure Policy or Tag inheritance. A common trap is assuming Azure Policy is needed to find untagged resources, but Policy enforces tagging rules, whereas Cost Management reports on existing tag usage and untagged costs. Memory tip: think “Cost Management = cost tracking + tag reporting,” while Policy is for enforcing, not reporting.
AZ-900 Describe Azure management and governance Practice Question
This AZ-900 practice question tests your understanding of describe azure management and governance. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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's finance team needs to track Azure costs by project. Each resource is tagged with a 'Project' tag, but some resources were created without tags. The finance team wants to generate a report that shows costs grouped by project and also identifies untagged resources. Which Azure tool should they use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Azure Cost Management + Billing
Azure Cost Management + Billing provides built-in cost analysis capabilities that allow you to group costs by tags (such as 'Project') and filter for untagged resources. It can generate reports that break down spending by tag values and explicitly show costs associated with resources that have no tags, meeting both requirements.
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 Cost Management + Billing
Why this is correct
Correct. Cost Management allows you to view and analyze costs by tags, and it includes reports that highlight untagged resources.
Related concept
Read the scenario before looking for a memorised answer.
✗
Azure Budgets
Why it's wrong here
Incorrect. Azure Budgets sets spending thresholds and sends alerts, but does not provide detailed cost reporting by tag.
✗
Azure Advisor
Why it's wrong here
Incorrect. Azure Advisor gives best practice recommendations, not cost reports by tag.
✗
Azure Resource Graph
Why it's wrong here
Incorrect. Azure Resource Graph is used to query resources and their properties, not to report on costs.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse Azure Budgets (which only monitors spending thresholds) with Cost Management (which provides full cost analysis and reporting), or assume Azure Advisor's cost recommendations include tag-based cost grouping.
Detailed technical explanation
How to think about this question
Azure Cost Management uses the Consumption API to ingest billing data and supports tag inheritance from resource groups to resources, though tags are not automatically inherited—they must be explicitly applied. The 'Cost by resource' view in Cost Analysis can filter by 'Tag' and includes a special 'Untagged resources' filter that shows costs for resources missing the specified tag, enabling precise cost allocation and governance auditing.
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 Cost Management + Billing — Azure Cost Management + Billing provides built-in cost analysis capabilities that allow you to group costs by tags (such as 'Project') and filter for untagged resources. It can generate reports that break down spending by tag values and explicitly show costs associated with resources that have no tags, meeting both requirements.
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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