- A
Assign an Azure Policy with the 'deny' effect at the management group scope to block deletions of any resource group.
Why wrong: This would affect all resource groups under the management group, not just the specific one. Additionally, Azure Policy is typically used for compliance and governance rules, not primarily to prevent accidental deletions; a resource lock is the simpler and more targeted solution.
- B
Apply a resource lock with the 'CanNotDelete' setting to the resource group.
A 'CanNotDelete' resource lock prevents deletion of the resource group and its resources but still allows modifications to the resources within. This lock is scoped to the specific resource group, so it does not affect other resource groups.
- C
Create a custom RBAC role that explicitly denies the delete action, and assign it to the infrastructure team at the resource group scope.
Why wrong: While a custom role could theoretically block deletions for a specific team, it does not prevent the resource owner or another privileged user from deleting the resource group. It also adds unnecessary complexity compared to using a resource lock, which is the recommended practice for preventing accidental deletion.
- D
Deploy an Azure Blueprint that includes a policy to audit deletions of the resource group.
Why wrong: Azure Blueprints are used to deploy a collection of resources and policies consistently. An audit policy only reports on compliance but does not actively prevent deletion. This does not meet the requirement to block delete operations.
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 manages its production workloads in a dedicated Azure subscription under the root management group. The infrastructure team recently created a critical resource group named 'rg-prod-core' that contains networking resources. To prevent accidental deletion of this entire resource group, the team needs a mechanism that blocks delete operations on 'rg-prod-core' while still allowing changes to resources within it. The solution must not affect any other resource groups in the subscription. Which Azure feature should the team apply to 'rg-prod-core'?
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
Apply a resource lock with the 'CanNotDelete' setting to the resource group.
Option B is correct because a resource lock with the 'CanNotDelete' setting prevents deletion of the resource group while still allowing read and update operations on resources within it. This lock applies only to the specific resource group scope, so it does not affect any other resource groups in the subscription. This directly meets the requirement to block deletion of 'rg-prod-core' without impacting other groups.
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.
- ✗
Assign an Azure Policy with the 'deny' effect at the management group scope to block deletions of any resource group.
Why it's wrong here
This would affect all resource groups under the management group, not just the specific one. Additionally, Azure Policy is typically used for compliance and governance rules, not primarily to prevent accidental deletions; a resource lock is the simpler and more targeted solution.
- ✓
Apply a resource lock with the 'CanNotDelete' setting to the resource group.
Why this is correct
A 'CanNotDelete' resource lock prevents deletion of the resource group and its resources but still allows modifications to the resources within. This lock is scoped to the specific resource group, so it does not affect other resource groups.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Create a custom RBAC role that explicitly denies the delete action, and assign it to the infrastructure team at the resource group scope.
Why it's wrong here
While a custom role could theoretically block deletions for a specific team, it does not prevent the resource owner or another privileged user from deleting the resource group. It also adds unnecessary complexity compared to using a resource lock, which is the recommended practice for preventing accidental deletion.
- ✗
Deploy an Azure Blueprint that includes a policy to audit deletions of the resource group.
Why it's wrong here
Azure Blueprints are used to deploy a collection of resources and policies consistently. An audit policy only reports on compliance but does not actively prevent deletion. This does not meet the requirement to block delete operations.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Azure Policy (which enforces compliance rules) with resource locks (which provide operational protection against accidental deletion), leading them to choose a policy-based solution that would affect broader scopes instead of the targeted lock.
Detailed technical explanation
How to think about this question
Resource locks in Azure are applied at the subscription, resource group, or resource scope and override any RBAC permissions, including those of the subscription owner. The 'CanNotDelete' lock prevents delete operations but allows all read and update actions, making it ideal for protecting critical infrastructure. Under the hood, Azure Resource Manager enforces this lock by checking the lock state before processing any delete request, returning a 403 Forbidden error if the lock is present.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this AZ-900 question test?
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: Apply a resource lock with the 'CanNotDelete' setting to the resource group. — Option B is correct because a resource lock with the 'CanNotDelete' setting prevents deletion of the resource group while still allowing read and update operations on resources within it. This lock applies only to the specific resource group scope, so it does not affect any other resource groups in the subscription. This directly meets the requirement to block deletion of 'rg-prod-core' without impacting other groups.
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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Last reviewed: Jun 11, 2026
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