- A
Azure Policy
Why wrong: Azure Policy enforces governance rules but does not run guest OS scripts.
- B
A Custom Script Extension
A Custom Script Extension runs scripts inside the virtual machine.
- C
Boot diagnostics
Why wrong: Boot diagnostics is used for troubleshooting and does not execute scripts.
- D
An availability set
Why wrong: An availability set provides resiliency and does not configure the guest OS.
Question 118 of 1,170
AZ-104 Deploy and Manage Azure Compute Practice Question
This AZ-104 practice question tests your understanding of deploy and manage azure compute. 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.
You need to run a PowerShell script inside a newly deployed Azure virtual machine to configure application settings immediately after deployment. Which feature should you use?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
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
✓
A Custom Script Extension
The Custom Script Extension (CSE) is the correct choice because it allows you to run a PowerShell script on an Azure VM after deployment, making it ideal for configuring application settings. CSE downloads and executes scripts on the VM using the Azure VM agent, and it can be invoked during VM creation or post-deployment via ARM templates, Azure CLI, or PowerShell.
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.
- ✗
Azure Policy
Why it's wrong here
Azure Policy enforces governance rules but does not run guest OS scripts.
When this WOULD be correct
You need to ensure that all VMs in a subscription have a specific tag applied automatically. Azure Policy with a 'deny' or 'modify' effect would be correct to enforce tagging rules during or after deployment.
- ✓
A Custom Script Extension
Why this is correct
A Custom Script Extension runs scripts inside the virtual machine.
Clue confirmation
The clue word "immediately / without restart" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Boot diagnostics
Why it's wrong here
Boot diagnostics is used for troubleshooting and does not execute scripts.
When this WOULD be correct
You need to troubleshoot why an Azure VM is not booting properly and want to view the console logs or screenshot to diagnose the issue.
- ✗
An availability set
Why it's wrong here
An availability set provides resiliency and does not configure the guest OS.
When this WOULD be correct
You need to ensure that at least two VMs hosting a critical application are not affected by the same hardware failure or maintenance event. In this scenario, deploying the VMs in an availability set would be the correct answer.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The AZ-104 exam frequently reuses these exact scenarios with slightly different constraints.
✓A Custom Script ExtensionCorrect answer▾
Why this is correct
A Custom Script Extension runs scripts inside the virtual machine.
✗Azure PolicyWrong answer — click to see why▾
Why this is wrong here
Azure Policy enforces compliance rules on resources but cannot execute scripts inside a VM after deployment; it only audits or applies configurations at the resource level.
★ When this WOULD be the correct answer
You need to ensure that all VMs in a subscription have a specific tag applied automatically. Azure Policy with a 'deny' or 'modify' effect would be correct to enforce tagging rules during or after deployment.
Why candidates choose this
Candidates may confuse Azure Policy's ability to apply configurations (like guest configuration) with running arbitrary scripts, or think policy can trigger script execution.
✗Boot diagnosticsWrong answer — click to see why▾
Why this is wrong here
Boot diagnostics captures serial console output and screenshots for troubleshooting boot failures, but it does not execute scripts or configure applications inside the VM after deployment.
★ When this WOULD be the correct answer
You need to troubleshoot why an Azure VM is not booting properly and want to view the console logs or screenshot to diagnose the issue.
Why candidates choose this
Candidates may confuse boot diagnostics with post-deployment configuration tools, thinking it can run scripts or apply settings during boot.
✗An availability setWrong answer — click to see why▾
Why this is wrong here
An availability set is used to ensure high availability of VMs by distributing them across fault and update domains, not for running scripts after deployment.
★ When this WOULD be the correct answer
You need to ensure that at least two VMs hosting a critical application are not affected by the same hardware failure or maintenance event. In this scenario, deploying the VMs in an availability set would be the correct answer.
Why candidates choose this
Candidates may confuse availability sets with deployment automation or post-deployment configuration tasks, thinking they provide a way to manage application settings across multiple VMs.
Analysis generated from the official AZ-104blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse Azure Policy (which governs resource configuration at the Azure control plane) with the Custom Script Extension (which operates inside the guest OS), leading them to incorrectly select Azure Policy for post-deployment script execution.
Detailed technical explanation
How to think about this question
Under the hood, the Custom Script Extension leverages the Azure VM agent (WindowsGuestAgent) to download the script from Azure Storage, GitHub, or a public URL, then executes it with local system privileges. A subtle behavior is that the extension runs only once by default; if the script fails, you must delete the extension resource and re-add it to retry. In real-world scenarios, CSE is often combined with ARM template deployments to bootstrap IIS, install SQL Server, or join a domain immediately after provisioning.
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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Deploy and Manage Azure Compute — study guide chapter
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FAQ
Questions learners often ask
What does this AZ-104 question test?
Deploy and Manage Azure Compute — This question tests Deploy and Manage Azure Compute — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: A Custom Script Extension — The Custom Script Extension (CSE) is the correct choice because it allows you to run a PowerShell script on an Azure VM after deployment, making it ideal for configuring application settings. CSE downloads and executes scripts on the VM using the Azure VM agent, and it can be invoked during VM creation or post-deployment via ARM templates, Azure CLI, or PowerShell.
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: "immediately / without restart". Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
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Last reviewed: Jun 11, 2026
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