Which of the following is a characteristic of the Always-on UPS?

A.
This kind of UPS is extremely expensive, large, and heavy

B.
It is usually found attached to PC servers

C.
The server runs from the UPS unit

D.
None of the above

Explanation:
A: The Always-on UPS units are extremely expensive, large, and heavy.
C: 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:
B: The On-when-needed UPS is normally used on a PC server.
References:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 251-273.