AZ-400 Configure processes and communications Practice Question
This AZ-400 practice question tests your understanding of configure processes and communications. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 organization is adopting Microsoft Entra ID for identity management. You need to configure Azure DevOps to trust tokens issued by Entra ID for service connections. Which authentication method should you use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Managed identity
Managed identity (Option B) is correct because it allows Azure DevOps to authenticate to Microsoft Entra ID without storing any credentials, using an identity automatically managed by Azure. This is the recommended approach for service connections when the Azure DevOps agent runs on an Azure resource (e.g., a VM or App Service) that supports managed identities, as it eliminates the need for secret rotation and reduces security risk.
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.
✗
Service principal with client secret
Why it's wrong here
This works but requires managing secrets, while managed identity is more secure and simpler.
✓
Managed identity
Why this is correct
Managed identities provide an automatically managed identity in Entra ID for service connections.
Related concept
Read the scenario before looking for a memorised answer.
✗
OAuth 2.0 authorization code grant
Why it's wrong here
This is for user authentication, not service-to-service.
✗
Personal access token (PAT)
Why it's wrong here
PATs are not Entra ID tokens and require manual rotation.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse managed identity with service principal authentication, thinking that a client secret is required for any non-interactive authentication, but managed identity provides a secretless, automatically rotated credential that is specifically designed for Azure-hosted resources.
Detailed technical explanation
How to think about this question
Managed identities use the Azure Instance Metadata Service (IMDS) endpoint (169.254.169.254) to obtain an access token from Microsoft Entra ID without any hardcoded credentials. Under the hood, the Azure DevOps agent can use the Azure CLI or REST API to acquire a token for the managed identity, which is then used to authenticate to Azure resources like Key Vault or storage accounts. In a real-world scenario, if you have a self-hosted agent running on an Azure VM, enabling a system-assigned managed identity allows the agent to securely access Azure DevOps service connections without ever storing a secret in the pipeline variables.
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.
Configure processes and communications — This question tests Configure processes and communications — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Managed identity — Managed identity (Option B) is correct because it allows Azure DevOps to authenticate to Microsoft Entra ID without storing any credentials, using an identity automatically managed by Azure. This is the recommended approach for service connections when the Azure DevOps agent runs on an Azure resource (e.g., a VM or App Service) that supports managed identities, as it eliminates the need for secret rotation and reduces security risk.
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.
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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