Which of the following best describe the Always-on UPS?

A.
The battery starts when the power fails

B.
It is usually found attached to PC servers

C.
The server runs from the UPS unit

D.
None of the above

Explanation:
The server does not directly get the power from the wall outlet. It runs from the UPS unit, receiving a steady and safe level of power.
Incorrect
Answers:
A, B: These are the characteristics of the On-when-needed UPS.
References:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 251-273.