AZ-900 Describe Azure management and governance Practice Question
A company has an Azure subscription with multiple resource groups. The governance team wants to ensure that every new resource created in the subscription automatically receives a 'Department' tag with a default value of 'Finance' if the creator did not specify one. The team wants the tag to be applied without blocking the creation of the resource. Which Azure feature should they use?
⚠ Common exam trap
Many candidates confuse 'Append' with 'Deny', assuming that enforcing a tag requires blocking non-compliant resources, but 'Append' silently adds the missing tag without interrupting the creation flow.
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
✓
Azure Policy with the 'Append' effect
Azure Policy with the 'Append' effect is the correct choice because it adds the 'Department' tag with a default value of 'Finance' to a resource during creation or update, without blocking the operation. Unlike 'Deny', which prevents non-compliant resources, 'Append' modifies the resource request to include the missing tag, ensuring compliance without interrupting the creation process.
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 Policy with the 'Deny' effect
Why it's wrong here
The 'Deny' effect would block the creation of any resource that does not have the 'Department' tag. This is not what the team wants because they want the resource to be created and the tag to be automatically added, not blocked.
When this WOULD be correct
Use Azure Policy with 'Deny' effect when the governance team wants to enforce that a specific tag must be provided by the creator, and any resource without it must be rejected (e.g., to ensure cost center tags are always explicitly assigned).
- ✓
Azure Policy with the 'Append' effect
Why this is correct
Azure Policy's 'Append' effect is a non-blocking governance action that injects specified fields, such as the 'Department' tag, into a resource as part of the resource manager's evaluation during create or update operations. If the tag is missing, Append adds it automatically before submission, ensuring the resource remains compliant without throwing an error. Because Append does not reject the deployment, it precisely matches the requirement to automatically apply the tag rather than prevent resource creation.
- ✗
Azure Resource Lock
Why it's wrong here
Azure Resource Locks (e.g., CanNotDelete or ReadOnly) are designed to protect resources from accidental deletion or modification by restricting operations at the management plan level. They do not evaluate or modify resource properties such as tags, nor do they perform automatic additions during resource creation. In fact, a ReadOnly lock can even block tag updates on existing resources, which is the opposite of the desired automatic tagging behavior.
When this WOULD be correct
A question where the requirement is to prevent accidental deletion or modification of critical resources, such as a production database or a network security group, by locking them at the resource group or subscription level.
- ✗
Azure role-based access control (RBAC) with a custom role
Why it's wrong here
Azure RBAC manages permissions for who can perform actions on resources. It does not automatically add tags to resources during creation. A custom role could be created, but it cannot automatically apply tags; it only grants or denies permissions.
When this WOULD be correct
A company wants to ensure that only users in the 'Finance' department can create virtual machines in a specific resource group. They need to restrict access based on user attributes. Azure RBAC with a custom role would be correct to grant or deny permissions to specific users or groups.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The AZ-900 exam frequently reuses these exact scenarios with slightly different constraints.
✓Azure Policy with the 'Append' effectCorrect answer▾
Why this is correct
Azure Policy's 'Append' effect is a non-blocking governance action that injects specified fields, such as the 'Department' tag, into a resource as part of the resource manager's evaluation during create or update operations. If the tag is missing, Append adds it automatically before submission, ensuring the resource remains compliant without throwing an error. Because Append does not reject the deployment, it precisely matches the requirement to automatically apply the tag rather than prevent resource creation.
✗Azure Policy with the 'Deny' effectWrong answer — click to see why▾
Why this is wrong here
The 'Deny' effect blocks resource creation if the tag is missing, but the requirement is to apply the tag automatically without blocking creation.
★ When this WOULD be the correct answer
Use Azure Policy with 'Deny' effect when the governance team wants to enforce that a specific tag must be provided by the creator, and any resource without it must be rejected (e.g., to ensure cost center tags are always explicitly assigned).
Why candidates choose this
Candidates may confuse 'Deny' with enforcement, assuming that blocking creation is the only way to ensure compliance, without realizing 'Append' can automatically add missing tags without disruption.
✗Azure Resource LockWrong answer — click to see why▾
Why this is wrong here
Azure Resource Lock prevents deletion or modification of resources but does not automatically apply tags to new resources. It cannot enforce tag inheritance or default values.
★ When this WOULD be the correct answer
A question where the requirement is to prevent accidental deletion or modification of critical resources, such as a production database or a network security group, by locking them at the resource group or subscription level.
Why candidates choose this
Candidates may confuse resource locks with governance policies, thinking locks can enforce compliance rules like tagging, when in fact locks only protect against changes.
✗Azure role-based access control (RBAC) with a custom roleWrong answer — click to see why▾
Why this is wrong here
Azure RBAC controls permissions to perform actions on resources, but it cannot automatically add tags to resources. The requirement is to automatically append a default tag, which is a governance enforcement action, not an access control.
★ When this WOULD be the correct answer
A company wants to ensure that only users in the 'Finance' department can create virtual machines in a specific resource group. They need to restrict access based on user attributes. Azure RBAC with a custom role would be correct to grant or deny permissions to specific users or groups.
Why candidates choose this
Candidates may confuse governance enforcement (tags) with access control, thinking that RBAC can be used to enforce tagging policies by restricting who can create resources without tags.
Analysis generated from the official AZ-900blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Go deeper
Related to this question
Learn chapter
Azure Cost Management and Billing
Key term
Feature
A feature is a distinct unit of functionality that delivers value to the user, often managed and tracked throughout the software development lifecycle.
Key term
Azure Policy
Azure Policy is a service in Microsoft Azure that lets you create, assign, and manage rules to ensure your resources stay compliant with your company standards and service-level agreements.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This AZ-900 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AZ-900 exam.