This AZ-204 practice question tests your understanding of implement azure security. 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.
You have multiple Azure virtual machines that need to access the same Azure Key Vault to retrieve certificates. You want to minimize administrative overhead while ensuring each VM can authenticate without managing credentials. Which identity type should you use?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
User-assigned managed identity assigned to each VM
Option B is correct because a user-assigned managed identity can be created once and then assigned to multiple Azure VMs, allowing all of them to authenticate to the same Key Vault without storing any credentials. This minimizes administrative overhead compared to managing separate system-assigned identities or service principals, as the identity is independent of any single VM's lifecycle and can be reused across resources.
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.
✗
System-assigned managed identity on each VM
Why it's wrong here
Each VM gets its own identity, requiring you to grant Key Vault access to each identity individually, increasing management overhead.
✓
User-assigned managed identity assigned to each VM
Why this is correct
A single user-assigned identity can be assigned to all VMs. You grant Key Vault access once, reducing overhead.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Service principal with client secret stored in each VM
Why it's wrong here
Service principals require managing client secrets, which adds security risk and overhead.
✗
Storage account key
Why it's wrong here
Storage account keys are for Azure Storage authentication, not for accessing Key Vault.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often choose system-assigned managed identities (Option A) because they seem simpler per-VM, but they overlook the administrative overhead of managing separate access policies for each VM when multiple VMs require identical access to the same Key Vault.
Detailed technical explanation
How to think about this question
User-assigned managed identities are Azure AD identities that exist independently of any VM; they can be assigned to multiple VMs via the Azure Instance Metadata Service (IMDS) endpoint (169.254.169.254). When a VM with a user-assigned identity requests a token, it specifies the identity's client ID in the IMDS call, and Azure AD returns an OAuth 2.0 access token scoped to that identity, which the VM then uses to authenticate to Key Vault. This approach is ideal for scenarios like a fleet of web servers that all need to read the same TLS certificate from a shared Key Vault, as you only manage one identity and one set of Key Vault access policies.
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 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-204 question in full detail.
Implement Azure security — This question tests Implement Azure security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: User-assigned managed identity assigned to each VM — Option B is correct because a user-assigned managed identity can be created once and then assigned to multiple Azure VMs, allowing all of them to authenticate to the same Key Vault without storing any credentials. This minimizes administrative overhead compared to managing separate system-assigned identities or service principals, as the identity is independent of any single VM's lifecycle and can be reused across resources.
What should I do if I get this AZ-204 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: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
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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