AZ-104 Certification Practice Question #270

Question

You have an Azure virtual machine named VM1.
You use Azure Backup to create a backup of VM1 named Backup1.
After creating Backup1, you perform the following changes to VM1:
✑ Modify the size of VM1.
✑ Copy a file named Budget.xls to a folder named Data.
✑ Reset the password for the built-in administrator account.
✑ Add a data disk to VM1.
An administrator uses the Replace existing option to restore VM1 from Backup1.
You need to ensure that all the changes to VM1 are restored.
Which change should you perform again?

Accepted Answer

When you restore an Azure VM using the "Replace existing" option, the virtual machine's disks are replaced with the disks from the restore point (Backup1). Any files created on the disks after Backup1 was taken (such as `Budget.xls`) will be lost because the disk contents are completely replaced by the snapshot. The VM size is an ARM resource property and is not affected by disk restoration. The data disk itself is not deleted from Azure; it is simply detached from the VM during the restore process and remains in the resource group, meaning it only needs to be re-attached rather than added (created) again. Therefore, the file copy is the change that must be performed again.

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