CMOS is a Computer Chip on the motherboard, which is :
Pick an option to check yourself, or open the answer below.
Show answer & explanation
Correct answer: A. RAM
Explanation
The motherboard 'CMOS' stores BIOS settings and the real-time clock in low-power static RAM kept alive by a battery; the firmware itself is in a separate ROM/flash chip.
Note on the official key: the official key says option B. Official key gives (B) ROM, but the CMOS chip is a small battery-backed RAM that holds BIOS settings and the clock.
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