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AZ-204 Practice Question: User-assigned managed identity shared across…
This AZ-204 practice question tests your understanding of user-assigned managed identity shared across…. 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. A key principle to apply: user-assigned managed identity. 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.
Twenty Azure Functions across different teams all need read access to the same Azure Cosmos DB account. The security team wants to revoke or modify this access for all twenty functions at once without visiting each Function App individually. What managed identity design satisfies this requirement?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
Create a service principal, store its client secret in Key Vault, and reference the secret from all twenty Function Apps via Key Vault references
This approach reintroduces a shared secret that must be rotated, stored securely, and distributed. Managed identities eliminate the need for any shared secrets. The user-assigned managed identity is the zero-secret equivalent of a shared service principal.
B
Distractor review
Store the Cosmos DB connection string in Azure App Configuration and reference it from all twenty Function Apps
A shared connection string in App Configuration grants access to whoever holds the string. Revoking access requires rotating the connection string and updating App Configuration — which requires all twenty apps to reload. It also reintroduces the credential storage problem that managed identities solve.
C
Best answer
Create one user-assigned managed identity, attach it to all twenty Function Apps, and grant it the Cosmos DB Built-in Data Reader role
The role assignment on the user-assigned identity propagates instantly to all twenty Function Apps that reference it. Revoking the role assignment revokes access everywhere simultaneously. Adding a new Function App just requires attaching the existing identity — no new role grants are needed.
D
Distractor review
Enable a system-assigned managed identity on each Function App and grant each identity the Cosmos DB Built-in Data Reader role
With system-assigned identities, there are twenty separate identity-to-role assignments. Revoking access requires removing twenty role assignments individually. This is exactly the operational overhead the security team wants to avoid.
Common exam trap
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Technical deep dive
How to think about this question
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- user-assigned managed identity
- shared identity
- centralized permission management
- managed identity vs service principal
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
user-assigned managed identity
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Question 6
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FAQ
Questions learners often ask
What does this AZ-204 question test?
user-assigned managed identity
What is the correct answer to this question?
The correct answer is: Create one user-assigned managed identity, attach it to all twenty Function Apps, and grant it the Cosmos DB Built-in Data Reader role — A user-assigned managed identity is an independent Azure resource that can be attached to multiple compute resources (Function Apps, VMs, Container Apps, etc.). Its lifecycle is independent of any single host. The Cosmos DB RBAC role is granted to the user-assigned identity once. All twenty Function Apps reference this identity in their configuration. When the security team needs to revoke or change access, they modify the identity's role assignment in one place — all twenty apps immediately lose or gain access without any per-app changes.
What should I do if I get this AZ-204 question wrong?
Review user-assigned managed identity, then practise related AZ-204 questions on the same topic to reinforce the concept.
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