The answer is the Custom Script Extension, which is the correct Azure feature for installing IIS, copying application files, and running a post-deployment configuration script on a Windows VM without interactive login. This extension works through the Azure VM agent to execute PowerShell or CLI scripts after the VM is deployed, making it ideal for automating software installation and configuration tasks that require no manual intervention. On the AZ-104 exam, this scenario tests your understanding of Azure VM extensions and their role in post-deployment automation, often appearing as a distractor against features like Desired State Configuration or Run Command—remember that CSE is for one-time script execution, not ongoing state management. A common trap is confusing it with the VM Agent itself, but the agent is the underlying service, while the extension is the tool you invoke. Memory tip: think "CSE for one-shot setup" to distinguish it from DSC’s continuous compliance.
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.
After a Windows VM is deployed, an administrator must install IIS, copy application files, and run a post-deployment configuration script without connecting interactively to the server. Which Azure feature should be used?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Custom Script Extension.
The Custom Script Extension (CSE) is the correct Azure feature because it allows you to run scripts on an Azure VM after deployment without requiring interactive login. It is specifically designed for post-deployment configuration tasks like installing IIS, copying application files, and executing configuration scripts, all executed via the Azure VM agent.
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.
✓
Custom Script Extension.
Why this is correct
The Custom Script Extension runs post-provisioning commands and scripts on a VM without interactive login.
Related concept
Read the scenario before looking for a memorised answer.
✗
An availability zone assignment.
Why it's wrong here
Zones improve resilience, but they do not execute post-deployment configuration scripts.
✗
A route table association.
Why it's wrong here
Route tables control network paths and cannot install software on a VM.
✗
A user-assigned managed identity alone.
Why it's wrong here
An identity can authenticate to Azure services, but it does not by itself run installation steps.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse the Custom Script Extension with other automation tools like Azure Automation or Desired State Configuration (DSC), but the question specifically requires a feature that runs a script post-deployment without interactive login, and CSE is the direct, lightweight solution for that task.
Detailed technical explanation
How to think about this question
The Custom Script Extension leverages the Azure VM agent (WindowsGuestAgent on Windows) to download and execute scripts from Azure Storage (or a public URL) using HTTPS. Under the hood, the extension writes script output and errors to the Windows Event Log (e.g., Application log) and can be invoked via Azure CLI, PowerShell, ARM templates, or the Azure portal. A real-world scenario is automating the installation of a web server and application code during a scale-out event in a Virtual Machine Scale Set, ensuring every new instance is configured identically without manual intervention.
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-104 question in full detail.
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: Custom Script Extension. — The Custom Script Extension (CSE) is the correct Azure feature because it allows you to run scripts on an Azure VM after deployment without requiring interactive login. It is specifically designed for post-deployment configuration tasks like installing IIS, copying application files, and executing configuration scripts, all executed via the Azure VM agent.
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.
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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These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. After a Windows VM is created, the administrator wants IIS installed and a configuration script run automatically without signing in to the server. Which Azure feature should be used?
easy
A.An availability set
✓ B.A virtual machine extension
C.An Azure Policy assignment
D.A network security group rule
Why B: A virtual machine extension (such as the Custom Script Extension for Windows) allows you to deploy and run scripts on an Azure VM after provisioning, without requiring any interactive sign-in. This is the correct Azure feature to automatically install IIS and execute a configuration script as part of the VM deployment or post-deployment automation.
Variation 2. Based on the exhibit, which Azure feature should the administrator use to install software and run the bootstrap script during VM provisioning?
medium
✓ A.Azure VM Custom Script Extension
B.A network security group rule allowing RDP from the Internet
C.An availability set with two fault domains
D.A managed disk snapshot restored as the operating system disk
Why A: The Azure VM Custom Script Extension (CSE) is the correct feature because it allows the administrator to execute scripts (such as installing software or running a bootstrap script) during VM provisioning or after the VM is running. The extension downloads the script from Azure Storage or a public URL and executes it using the local system account, making it ideal for post-deployment configuration tasks.
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Question Discussion
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