This AZ-104 practice question tests your understanding of manage azure identities 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.
You need to ensure that all new resources deployed to a subscription automatically receive a CostCenter tag with a default value if the tag is omitted during deployment. Which Azure governance feature should you use?
A resource lock
Why wrong: Resource locks prevent changes such as deletion or modification but do not add tags.
An Azure Policy with an append or modify effect
Azure Policy can add the required tag automatically when resources are created.
A management group lock
Why wrong: Locks do not enforce tagging standards.
A custom RBAC role
Why wrong: RBAC controls permissions, not automatic metadata enforcement.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
An Azure Policy with an append or modify effect
Azure Policy with an append or modify effect can automatically add a CostCenter tag with a default value to resources that are missing it during deployment. The append effect adds the tag and value at creation time, while the modify effect (using a 'addOrReplace' operation) can also update existing resources. This ensures governance compliance without manual intervention.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
A resource lock
Why it's wrong here
Resource locks prevent changes such as deletion or modification but do not add tags.
An Azure Policy with an append or modify effect
Why this is correct
Azure Policy can add the required tag automatically when resources are created.
Related concept
Read the scenario before looking for a memorised answer.
A management group lock
Why it's wrong here
Locks do not enforce tagging standards.
A custom RBAC role
Why it's wrong here
RBAC controls permissions, not automatic metadata enforcement.
Common exam traps
The trap here is confusing Azure Policy (which enforces and automatically applies tags) with resource locks or RBAC roles, which manage permissions or prevent changes but do not automatically add missing tags.
Detailed technical explanation
Azure Policy's append effect works by injecting additional properties (like tags) into the resource during deployment, evaluated at the time of resource creation via Azure Resource Manager. The modify effect uses a 'addOrReplace' operation and can be combined with a 'conflictEffect' to handle existing resources. This is particularly useful in multi-subscription environments where consistent cost tracking is required across all resources.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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.
What to study next
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FAQ
Manage Azure Identities and Governance — This question tests Manage Azure Identities and Governance — Read the scenario before looking for a memorised answer..
The correct answer is: An Azure Policy with an append or modify effect — Azure Policy with an append or modify effect can automatically add a CostCenter tag with a default value to resources that are missing it during deployment. The append effect adds the tag and value at creation time, while the modify effect (using a 'addOrReplace' operation) can also update existing resources. This ensures governance compliance without manual intervention.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
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