Microsoft Azure Administrator (AZ104) Practice Exam

Question: 1 / 400

You plan to change the size of a virtual machine. Which change will cause downtime for the VM?

Add a 500-GB managed disk.

Attach an additional network interface.

Add the Puppet Agent extension.

Change the size to D8s v3.

When you change the size of a virtual machine in Azure, specifically to a different VM size like D8s v3, it requires the virtual machine to be stopped and deallocated prior to the size change. This process inherently involves downtime since the VM cannot be actively running during this operation. Azure needs to reconfigure the resources allocated to the VM, which cannot be done while the VM is powered on.

The other options, such as adding a managed disk, attaching an additional network interface, and adding the Puppet Agent extension, can typically be performed while the VM is running. These modifications do not require the deallocation of the VM, which means they do not result in any downtime. Thus, changing the size of the VM stands out as the action that directly causes the VM to go offline, making it the correct answer.

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