You create a scheduled flow to run desktop flow. Desktop flow runs only if all users are signed out. 
In what mode does this desktop flow run?

Answer options:

A.System
B.Admin
C.Attended
D.User
E.Unattended

Correct Answer: E 
You can run desktop flow in two modes: attended and unattended. 
An unattended mode requires all users to sign out from the device that desktop flow runs on. When desktop flow runs in unattended mode, it automatically signs into a target Windows device. The device needs to run Windows 10, Windows Server 2016, or 2019. After finishing the run, desktop flow automatically exits the device and returns control to Power Automate. 
On the contrary, an attended mode requires the use of the current Windows session. The attended desktop flow operator can monitor the flow execution, handle the errors, and provide any additional desktop flow information. 
All other options are incorrect. 
For more information about Power Automate desktop flow, please visit the below URL: 

https://docs.microsoft.com/en-us/power-automate/desktop-flows/run-desktop-flow