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Secure identity and access →mediumMultiple ChoiceObjective-mapped

Quick Answer

The answer is that the custom role definition is missing the 'Microsoft.Compute/virtualMachines/read' action. Without this read permission, Azure RBAC prevents the user from even discovering or interacting with the virtual machine resource, which blocks any subsequent management operations like restarting it. This is a fundamental principle of Azure’s role-based access control: write or action permissions require a corresponding read permission on the same resource provider path. On the AZ-500 exam, this scenario tests your understanding of how Azure RBAC evaluates permissions hierarchically, and it is a common trap where candidates assume the restart action alone is sufficient. A reliable memory tip is “no read, no deed” — without read, no other action on that resource will succeed.

AZ-500 Secure identity and access Practice Question

This AZ-500 practice question tests your understanding of secure identity and access. 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.

Exhibit

{
  "roleName": "Custom VM Operator",
  "assignableScopes": ["/subscriptions/12345-abcde-.../resourceGroups/Prod"],
  "permissions": [{
    "actions": [
      "Microsoft.Compute/virtualMachines/start/action",
      "Microsoft.Compute/virtualMachines/restart/action"
    ],
    "notActions": []
  }]
}

Refer to the exhibit. A custom role definition is created with the JSON above. A user assigned this role in the Prod resource group attempts to restart a VM but receives an authorization error. 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.

Question 1mediummultiple choice
Full question →

Exhibit

{
  "roleName": "Custom VM Operator",
  "assignableScopes": ["/subscriptions/12345-abcde-.../resourceGroups/Prod"],
  "permissions": [{
    "actions": [
      "Microsoft.Compute/virtualMachines/start/action",
      "Microsoft.Compute/virtualMachines/restart/action"
    ],
    "notActions": []
  }]
}

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

The role definition lacks the 'Microsoft.Compute/virtualMachines/read' action

The correct answer is A: The role definition is missing the 'Microsoft.Compute/virtualMachines/read' action. Without read, the user cannot see or interact with the VM, leading to authorization errors. Option B is wrong because the assignable scope is correct. Option C is wrong because the user is assigned the role. Option D is wrong because the role is not missing the restart action.

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 assignable scope should include the subscription

    Why it's wrong here

    The scope is specific but valid; missing read is the issue.

  • ✗

    The role definition includes 'restart' but not 'start'

    Why it's wrong here

    Restart is included; the issue is missing read.

  • ✓

    The role definition lacks the 'Microsoft.Compute/virtualMachines/read' action

    Why this is correct

    The read action is required to perform start/restart operations.

    Clue confirmation

    The clue word "most likely" in the question point toward this answer.

    Related concept

    Authentication checks who the user is.

  • ✗

    The user is not assigned the role at the correct scope

    Why it's wrong here

    The assignment is at the correct resource group.

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 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.

What to study next

Got this wrong? Here's your next step.

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-500 questions on access control and AAA configuration.

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FAQ

Questions learners often ask

What does this AZ-500 question test?

Secure identity and access — This question tests Secure identity and access — Authentication checks who the user is..

What is the correct answer to this question?

The correct answer is: The role definition lacks the 'Microsoft.Compute/virtualMachines/read' action — The correct answer is A: The role definition is missing the 'Microsoft.Compute/virtualMachines/read' action. Without read, the user cannot see or interact with the VM, leading to authorization errors. Option B is wrong because the assignable scope is correct. Option C is wrong because the user is assigned the role. Option D is wrong because the role is not missing the restart action.

What should I do if I get this AZ-500 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-500 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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Last reviewed: Jun 20, 2026

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This AZ-500 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AZ-500 exam.