- A
The VM is placed in an availability zone that supports backup.
Why wrong: Availability zone placement does not cause the VM agent not ready error and is not the first item to check.
- B
The Azure VM Agent is installed, running, and able to provision backup-related extensions.
Azure Backup relies on the VM agent and extensions inside the guest. If the agent is missing, stopped, or unhealthy, backup jobs can fail before a recovery point is created. Verifying the agent first addresses the specific error message.
- C
The VM has a public IP address assigned for outbound connectivity.
Why wrong: A public IP is not required for Azure Backup, and this issue is unrelated to whether the agent inside the VM is ready.
- D
The VM is added to a load balancer backend pool.
Why wrong: Load balancer membership does not affect Azure Backup extension provisioning or agent readiness.
Quick Answer
The answer is that the administrator should first verify the Azure VM Agent is installed, running, and in a 'Ready' state. This is correct because the Azure Backup service relies on the VM Agent to install and manage backup extensions like IaaSBcdrExtension for Windows or SnapshotV2 for Linux; if the agent is missing, stopped, or stuck in a 'Not Ready' status, the backup extension cannot be provisioned, causing every job to fail immediately. On the AZ-104 exam, this scenario tests your understanding of Azure Backup prerequisites and the dependency chain between the VM Agent, extensions, and backup operations—a common trap is assuming the issue is network connectivity or storage configuration, when the root cause is often a disabled or uninstalled agent. To remember this, think of the VM Agent as the "gatekeeper" for backup: if the gatekeeper isn't ready, no backup extension gets through.
AZ-104 Monitor and Maintain Azure Resources Practice Question
This AZ-104 practice question tests your understanding of monitor and maintain azure resources. 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.
An admin enables backup on a newly deployed Azure VM, but every backup job fails immediately with a message that the VM agent is not ready. What should the administrator verify first?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"first"Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Clue:
"immediately / without restart"Why it matters: Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.
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 Azure VM Agent is installed, running, and able to provision backup-related extensions.
The Azure VM Agent (also known as the Windows Guest Agent or Linux Agent) is required for the Azure Backup service to install the backup extension (e.g., IaaSBcdrExtension for Windows or SnapshotV2 for Linux). If the agent is not installed, not running, or is in a 'Not Ready' state, the backup extension cannot be provisioned, causing immediate failure. The administrator should first verify that the VM Agent is installed and its status is 'Ready' in the VM's properties.
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 VM is placed in an availability zone that supports backup.
Why it's wrong here
Availability zone placement does not cause the VM agent not ready error and is not the first item to check.
- ✓
The Azure VM Agent is installed, running, and able to provision backup-related extensions.
Why this is correct
Azure Backup relies on the VM agent and extensions inside the guest. If the agent is missing, stopped, or unhealthy, backup jobs can fail before a recovery point is created. Verifying the agent first addresses the specific error message.
Clue confirmation
The clue words "first", "immediately / without restart" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The VM has a public IP address assigned for outbound connectivity.
Why it's wrong here
A public IP is not required for Azure Backup, and this issue is unrelated to whether the agent inside the VM is ready.
- ✗
The VM is added to a load balancer backend pool.
Why it's wrong here
Load balancer membership does not affect Azure Backup extension provisioning or agent readiness.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume network connectivity (public IP or load balancer) is the root cause, but the immediate failure message 'VM agent not ready' directly points to the agent status, not network issues.
Detailed technical explanation
How to think about this question
The Azure VM Agent communicates with the Azure Fabric Controller over TCP port 443 (HTTPS) to receive and execute extension commands. When the agent is not ready, the backup service cannot deploy the snapshot extension, which is responsible for taking application-consistent snapshots using VSS (on Windows) or fs-freeze (on Linux). In a real-world scenario, a common cause is that the agent was disabled or uninstalled during VM customization, or the VM was created from a generalized image that did not include the agent.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this AZ-104 question test?
Monitor and Maintain Azure Resources — This question tests Monitor and Maintain Azure Resources — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The Azure VM Agent is installed, running, and able to provision backup-related extensions. — The Azure VM Agent (also known as the Windows Guest Agent or Linux Agent) is required for the Azure Backup service to install the backup extension (e.g., IaaSBcdrExtension for Windows or SnapshotV2 for Linux). If the agent is not installed, not running, or is in a 'Not Ready' state, the backup extension cannot be provisioned, causing immediate failure. The administrator should first verify that the VM Agent is installed and its status is 'Ready' in the VM's properties.
What should I do if I get this AZ-104 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: "first", "immediately / without restart". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 11, 2026
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