AZ-400 Develop a security and compliance plan Practice Question
This AZ-400 practice question tests your understanding of develop a security and compliance plan. 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.
A company uses Azure DevOps and has a security policy that all pipeline runs must use a specific service connection scoped to a resource group. A developer reports that a pipeline fails with the error: 'The service connection does not have permission to access the resource.' What is the most likely cause?
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 used by the service connection does not have the required role assignment on the resource group.
Option D is correct because the error 'The service connection does not have permission to access the resource' indicates that the service principal associated with the service connection lacks the necessary Azure RBAC role assignment on the target resource group. In Azure DevOps, a service connection authenticates via a service principal, and that principal must have a role (e.g., Contributor) explicitly assigned at the resource group scope to perform actions like deploying resources. Without this role assignment, the pipeline fails with an access-denied error.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 Azure subscription linked to the service connection is disabled.
Why it's wrong here
A disabled subscription would show a different error.
✗
The service connection name is misspelled in the pipeline YAML.
Why it's wrong here
The error is about permissions, not a missing connection.
✗
The variable group in the library does not include the service connection ID.
Why it's wrong here
Variable groups do not affect service connection permissions.
✓
The service principal used by the service connection does not have the required role assignment on the resource group.
Why this is correct
Missing role assignments cause access denied errors.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse service connection authentication (which always works if the connection is valid) with authorization (RBAC role assignments), leading them to pick options about disabled subscriptions or misspelled names instead of the missing role assignment.
Trap categories for this question
Command / output trap
A disabled subscription would show a different error.
Detailed technical explanation
How to think about this question
Under the hood, Azure DevOps service connections use Azure AD service principals with client credentials (client ID and secret) to authenticate. The pipeline's Azure Resource Manager task then makes REST API calls to the Azure management plane; if the service principal lacks the required RBAC role (e.g., Contributor) at the resource group scope, Azure returns HTTP 403 Forbidden, which surfaces as the permission error. A common real-world scenario is when a service connection is created with 'Contributor' at the subscription level but the pipeline targets a resource group in a different subscription, or when the role assignment is accidentally removed during maintenance.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
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
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-400 question in full detail.
Develop a security and compliance plan — This question tests Develop a security and compliance plan — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The service principal used by the service connection does not have the required role assignment on the resource group. — Option D is correct because the error 'The service connection does not have permission to access the resource' indicates that the service principal associated with the service connection lacks the necessary Azure RBAC role assignment on the target resource group. In Azure DevOps, a service connection authenticates via a service principal, and that principal must have a role (e.g., Contributor) explicitly assigned at the resource group scope to perform actions like deploying resources. Without this role assignment, the pipeline fails with an access-denied error.
What should I do if I get this AZ-400 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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?
Read the scenario before looking for a memorised answer.
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Question Discussion
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