Functional
Ask the auditee to start VirtualBox.
Is VirtualBox correctly installed on the auditee's machine?
Ask the auditee to show you his VM with a version of debian already installed.
Does the virtual machine boot Debian properly (in less than 2 minutes)?
After the boot is completed, ask the auditee to shutdown his VM with the ACPI Shutdown.
Does the system react to the ACPI Shutdown and does the virtual machine stop?