The answer is that both policies apply, and the most restrictive (Deny) takes precedence. This is because Azure Policy inheritance in a management group hierarchy is cumulative and non-destructive—policies assigned at higher levels (Root) flow down to all child management groups and subscriptions, so the Production subscription inherits both the Root-level allow policy and the UK-level deny policy. When a Deny effect conflicts with an Allow effect, Deny always overrides, making the UK policy the effective rule. On the AZ-900 exam, this scenario tests your understanding of how policy inheritance works across management groups, often appearing as a trick where candidates assume only the closest policy applies. A common trap is forgetting that inheritance is additive, not exclusive. Remember the memory tip: “Deny dominates down the hierarchy”—if any level says no, the whole branch below is blocked, regardless of permissive policies above.
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 has a management group hierarchy: Root → UK → Production. They assign a policy at the Root level that allows only certain VM sizes. Later, they assign another policy at the UK level that denies all resources. What is the effective effect on the Production subscription?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Both policies apply, and the most restrictive (Deny) takes precedence.
D is correct because Azure Policy is inherited and cumulative down the management group hierarchy. The Root-level policy (allow only certain VM sizes) and the UK-level policy (deny all resources) both apply to the Production subscription. When a deny policy conflicts with an allow policy, the deny effect always takes precedence, making the most restrictive policy effective.
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.
✗
Only the Root policy applies because it is at the highest level.
Why it's wrong here
Policies at lower levels also apply; they are evaluated in combination.
✗
Only the UK policy applies because it is more specific.
Why it's wrong here
Both policies apply, but the more restrictive effect wins in a conflict.
✗
Both policies apply, and the order of evaluation could cause a conflict.
Why it's wrong here
No conflict; Azure Policy resolves conflicts by applying the most restrictive effect.
✓
Both policies apply, and the most restrictive (Deny) takes precedence.
Why this is correct
Correct. Deny overrides any other effect, so the UK-level Deny prevents all resource creation.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates mistakenly apply a 'closest match' or 'most specific wins' logic from networking or RBAC to Azure Policy, whereas Azure Policy uses cumulative inheritance with deny overriding allow.
Detailed technical explanation
How to think about this question
Azure Policy uses an explicit deny-override model: if any policy in the inheritance chain has a 'deny' effect for a resource action, that deny is enforced even if another policy would allow it. This is implemented via the policy engine's evaluation logic, which checks all applicable policies and applies the most restrictive effect (deny > modify > append > audit > disabled). In this scenario, the UK-level deny policy effectively blocks all resource creation in the Production subscription, rendering the Root-level allow policy irrelevant for any resource that would otherwise be denied.
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
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.
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: Both policies apply, and the most restrictive (Deny) takes precedence. — D is correct because Azure Policy is inherited and cumulative down the management group hierarchy. The Root-level policy (allow only certain VM sizes) and the UK-level policy (deny all resources) both apply to the Production subscription. When a deny policy conflicts with an allow policy, the deny effect always takes precedence, making the most restrictive policy effective.
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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