This AZ-400 practice question tests your understanding of design and implement a devops infrastructure. 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 team wants to enforce that all Azure resource groups in a subscription are tagged with 'CostCenter' and 'Environment'. They need a solution that automatically applies these tags to any new resource group and ensures compliance without manual intervention. What should they use?
Azure Policy
Azure Policy can enforce tagging rules via 'deny' or 'append' effects on resource groups.
Azure RBAC
Why wrong: RBAC controls permissions, not resource configuration like tags.
Azure Blueprints
Why wrong: Azure Blueprints deploy environments but do not enforce tags in real-time during resource group creation.
Azure Resource Graph
Why wrong: Resource Graph is a query tool, not a compliance enforcement mechanism.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Azure Policy
Azure Policy is the correct choice because it allows you to define and enforce tagging rules at scale. By creating a policy that requires 'CostCenter' and 'Environment' tags on resource groups, and setting the policy effect to 'deny' or 'append' (to automatically add missing tags), any new resource group creation that violates the policy is blocked or automatically remediated, ensuring 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.
Azure Policy
Why this is correct
Azure Policy can enforce tagging rules via 'deny' or 'append' effects on resource groups.
Related concept
Read the scenario before looking for a memorised answer.
Azure RBAC
Why it's wrong here
RBAC controls permissions, not resource configuration like tags.
Azure Blueprints
Why it's wrong here
Azure Blueprints deploy environments but do not enforce tags in real-time during resource group creation.
Azure Resource Graph
Why it's wrong here
Resource Graph is a query tool, not a compliance enforcement mechanism.
Common exam traps
The trap here is that candidates confuse Azure Blueprints (which can include policies) with Azure Policy itself, but Blueprints are for deploying entire environments, not for continuous, automatic enforcement on all new resource groups across a subscription.
Detailed technical explanation
Azure Policy uses a JSON-based policy definition with an 'if/then' logic; for tagging, the 'append' effect can automatically add missing tags during resource creation, while 'deny' blocks non-compliant creation. A real-world nuance: the 'modify' effect (via a remediation task) can fix existing non-compliant resources, but for new resource groups, 'append' or 'deny' is used directly at creation time. Policy evaluation is triggered on resource creation and update operations, ensuring real-time enforcement.
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
Design and implement a DevOps infrastructure — This question tests Design and implement a DevOps infrastructure — Read the scenario before looking for a memorised answer..
The correct answer is: Azure Policy — Azure Policy is the correct choice because it allows you to define and enforce tagging rules at scale. By creating a policy that requires 'CostCenter' and 'Environment' tags on resource groups, and setting the policy effect to 'deny' or 'append' (to automatically add missing tags), any new resource group creation that violates the policy is blocked or automatically remediated, ensuring 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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