Which of the following is TRUE?

A.
The purpose of the Uninterruptible Power Supply (UPS) is to prevent data loss in the event of a major power failure.

B.
The Uninterruptible Power Supply (UPS) power rating is measured in Volt (V).

C.
An UPS is simply a battery backup system.

D.
The Uninterruptible Power Supply (UPS) will protect the server against sag.

Explanation:
This UPS is simply a battery backup system that will keep the system running, and permit the system to shut down normally in case of a power failure.
Incorrect Answers:
B: The most important thing to consider when purchasing a UPS is its power rating, which is measured in Volt-Amps (VA).
D: If there is a surge or a sag in the power supply, the UPS will pass it right on through to the server.
References:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 227-240.