AZ-104 Question #107: Real Exam Question with Answer & Explanation

Question

Hotspot Question You have an Azure subscription named Subscription1. You plan to deploy an Ubuntu Server virtual machine named VM1 to Subscription1. You need to perform a custom deployment of the virtual machine. A specific trusted root certification authority (CA) must be added during the deployment. What should you do? To answer, select the appropriate options in the answer area. NOTE: Each correct selection is worth one point. Answer:

Options

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Explanation

To perform a custom deployment of an Ubuntu Server VM, including adding a trusted root CA during deployment, you should use a cloud-init script (Cloud-init.txt) and deploy it via the Azure CLI's 'az vm create' command.

Approach. The question requires a custom deployment for an Ubuntu Server virtual machine, specifically to add a trusted root certification authority (CA) during deployment. For Linux virtual machines in Azure, the standard and most flexible mechanism for custom provisioning and running scripts during initial boot is cloud-init. Therefore, 'Cloud-init.txt' is the correct file to create.

To deploy a virtual machine with a cloud-init script, command-line tools like the Azure CLI or Azure PowerShell are typically used. The 'az vm create' command (Azure CLI) supports the --custom-data or --cloud-init-file parameter, allowing you to pass the content of your cloud-init script directly during the VM creation process. This enables the VM to execute the script, which can include commands to add a trusted root CA, upon its first boot. Thus, 'The az vm create command' is a correct and common tool for this purpose.

Common mistakes.

• common_mistake. 1. Choosing 'Unattend.xml' or 'Autounattend.conf': These files are primarily used for unattended installations and customizations of Windows operating systems. They are not applicable to Ubuntu Server or other Linux distributions.

1. Choosing 'Answer.ini': This is a generic INI file format and not a recognized standard for VM provisioning in Azure, neither for Windows nor Linux.
2. Choosing 'The Azure portal' for deployment: While the Azure portal does offer an option to provide custom data (including cloud-init scripts) during VM creation, for highly 'custom deployment' scenarios involving specific script execution and file manipulations like adding a CA, command-line tools such as Azure CLI or Azure PowerShell are generally preferred for their automation capabilities, repeatability, and direct control. The question implies a programmatic or script-driven approach, which aligns better with CLI/PowerShell.
3. Choosing 'The New-AzureRmVm cmdlet': While 'New-AzureRmVm' (Azure PowerShell) is also a valid tool to deploy an Azure VM with a cloud-init script (using the -CustomData parameter), the question expects a single correct selection among the given options for the 'Tool to use'. Both CLI and PowerShell cmdlets are technically capable, but 'az vm create' is a perfectly valid and commonly used option for Linux VM deployments.

Concept tested. The core concepts tested are: 1. Customizing Linux Virtual Machines in Azure during deployment using cloud-init. 2. Understanding the appropriate tools (Azure CLI/PowerShell) for deploying VMs with custom configurations. 3. Differentiating between Linux and Windows VM provisioning mechanisms (cloud-init vs. Unattend.xml). 4. The ability to perform initial configuration tasks like adding trusted root CAs during VM creation.

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