AZ-400 Practice Question: Design and implement build and release pipelines
This AZ-400 practice question tests your understanding of design and implement build and release pipelines. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
Your Azure DevOps pipeline deploys an ARM template to create a storage account. The deployment fails with 'AuthorizationFailed' error. The service principal used by the service connection has 'Contributor' role on the resource group. What is the most likely issue?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The service principal does not have 'Contributor' role at the subscription scope.
Option B is correct because ARM template deployments require 'Microsoft.Resources/deployments/write' permission, which is included in Contributor. However, if the deployment is at subscription scope, the service principal needs Contributor on the subscription. Option A is incorrect because the error is authorization, not conflict. Option C is not required. Option D is incorrect because ARM templates don't require a specific provider registration for deployment itself.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
The service principal is not registered for the 'Microsoft.Storage' resource provider.
Why it's wrong here
Resource providers are registered at the subscription level, not per service principal.
✗
The storage account name is already taken.
Why it's wrong here
That would cause a different error (Conflict).
✗
The ARM template is using an unsupported API version.
Why it's wrong here
That would cause a different error (InvalidTemplate).
✓
The service principal does not have 'Contributor' role at the subscription scope.
Why this is correct
If the deployment is at subscription scope, subscription-level permissions are needed.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Authentication checks who the user is.
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
Authentication checks who the user is.
Authorization controls what the user is allowed to do after login.
Privilege levels affect access to EXEC and configuration commands.
AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
→Do not assume successful login means full administrative access.
→Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
→Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-400 question in full detail.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related AZ-400 questions on access control and AAA configuration.
Design and implement build and release pipelines — This question tests Design and implement build and release pipelines — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: The service principal does not have 'Contributor' role at the subscription scope. — Option B is correct because ARM template deployments require 'Microsoft.Resources/deployments/write' permission, which is included in Contributor. However, if the deployment is at subscription scope, the service principal needs Contributor on the subscription. Option A is incorrect because the error is authorization, not conflict. Option C is not required. Option D is incorrect because ARM templates don't require a specific provider registration for deployment itself.
What should I do if I get this AZ-400 question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related AZ-400 questions on access control and AAA configuration.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Authentication checks who the user is.
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