Quick Answer
The answer is the Deny effect. This is correct because the Deny effect actively blocks the creation or update of any Azure resource that violates the policy rule, such as a naming convention requiring all resources to start with 'Contoso-'. When a deployment attempt fails the condition, Azure Policy returns a 403 Forbidden status, preventing the non-compliant resource from ever being provisioned. On the Microsoft Azure Fundamentals AZ-900 exam, this scenario tests your understanding of how Azure Policy effects enforce compliance at the point of creation, distinguishing Deny from effects like Audit (which only logs violations) or DeployIfNotExists (which remediates after creation). A common trap is confusing Deny with Audit, but remember: Deny stops the action cold, while Audit merely warns you. For a memory tip, think of a bouncer at a club—Deny is the bouncer who refuses entry at the door, ensuring only resources with the right name get in.
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 wants to enforce a naming convention for all Azure resources. For example, all resources must start with 'Contoso-'. They want to automatically audit and deny creation of resources that do not follow the naming convention. Which Azure Policy effect should they use?
Deny
Deny blocks creation of resources that violate the naming rule.
Audit
Why wrong: Audit only logs non-compliance, it does not prevent creation.
Modify
Why wrong: Modify can change properties but does not deny creation.
Append
Why wrong: Append adds additional fields but does not deny creation.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Deny
The Deny effect is correct because it actively prevents the creation of Azure resources that do not match the defined naming convention rule, such as requiring all resources to start with 'Contoso-'. This effect evaluates the resource against the policy rule during deployment and rejects the request with a 403 Forbidden status if the condition is not met, ensuring compliance before the resource is created.
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.
Deny
Why this is correct
Deny blocks creation of resources that violate the naming rule.
Related concept
Read the scenario before looking for a memorised answer.
Audit
Why it's wrong here
Audit only logs non-compliance, it does not prevent creation.
Modify
Why it's wrong here
Modify can change properties but does not deny creation.
Append
Why it's wrong here
Append adds additional fields but does not deny creation.
Common exam traps
The trap here is that candidates often confuse 'Audit' (which only reports non-compliance) with 'Deny' (which actively blocks non-compliant deployments), leading them to choose Audit because they think auditing is sufficient for enforcement.
Detailed technical explanation
Azure Policy uses a policy definition with a condition and an effect; the Deny effect triggers a pre-deployment evaluation via Azure Resource Manager, returning a 403 Forbidden error if the condition (e.g., name not starting with 'Contoso-') is true. Under the hood, the policy rule is written in JSON using ARM template functions like 'startswith' or 'like', and the Deny effect is evaluated before any resource provisioning, making it ideal for mandatory naming conventions. In a real-world scenario, a company might combine Deny with a 'not' condition to block any resource whose name does not match the pattern, ensuring all new resources adhere to the standard.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
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FAQ
Describe Azure management and governance — This question tests Describe Azure management and governance — Read the scenario before looking for a memorised answer..
The correct answer is: Deny — The Deny effect is correct because it actively prevents the creation of Azure resources that do not match the defined naming convention rule, such as requiring all resources to start with 'Contoso-'. This effect evaluates the resource against the policy rule during deployment and rejects the request with a 403 Forbidden status if the condition is not met, ensuring compliance before the resource is created.
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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Same concept, more angles
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company has a policy that all Azure resources must have a 'CostCenter' tag. They want to automatically audit and deny the creation of any resource that does not include this tag. Which Azure Policy effect should they use?
mediumWhy A: The 'Deny' effect is correct because the company's policy requires that any resource creation attempt missing the 'CostCenter' tag must be blocked entirely, not just reported or modified. Azure Policy's Deny effect actively prevents the resource from being provisioned by rejecting the API call at the Azure Resource Manager level, ensuring non-compliant resources are never created.
Last reviewed: Jun 11, 2026
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