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Comptia A+ 220-602 IT Technician
Password management and locking workstations
When should you replace the CMOS Battery? (Choose two)
A. If the incorrect date is displayed after each start-up.
B. When the CD-ROM does not work properly.
C. If the time is wrong every time you switch your computer on.
D. If there is no power going to your power supply.
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Answer: A, C
Explanation:
Your PC has to keep certain settings when it's turned off and its power cord unplugged.
These settings include: Date, Time, Hard drive configuration and Memory. Your PC
keeps these settings in a special memory chip called the Complimentary Metal-Oxide
Semiconductor (CMOS) chip. Thus when an incorrect date is displayed after startup and
if the time displayed is wrong when switching on the computer, you should replace the
battery.
Incorrect answers:
B: CD-ROM functionality is not the purpose of the CMOS battery.
D: Power provision for the power supply is not the function of the CMOS battery
Reference:
David Groth and Dan Newland, A+ Complete Study Guide (2nd Edition), Sybex,
Alameda, CA, 2001, p. 73