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What is the purpose of a CMOS chip in a CPU?
1. Interface between the operating system and the motherboard
2. Saves system information such as time and date
3. Provides power to all internal parts of the computer.
4. Protects internal parts from overheating.

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Correct Answer - Option 3 : Provides power to all internal parts of the computer.

The correct answer is to provide power to all internal parts of the computer.

  • The Complementary Metal-Oxide-Semiconductor is a physical part of the motherboard.
  • It is a memory chip that houses setting configurations and is powered by the onboard battery
  • The CMOS is reset and loses all custom settings in case the battery runs out of energy, additionally, the system clock resets when the CMOS loses power.


  • Basic Input/Output System(BIOS)
    • It is a special kind of program which is required for the CPU to talk to other devices. ROM chip stores all this information and the program which is stored on ROM chips is called firmware.
  • Complementary Metal-Oxide-Semiconductor (CMOS)
    • The data on the CMOS chip can be accessed and updated via the CMOS Setup program.
    • Power is required to maintain the data stored on CMOS Chip, power is supplied by a battery on the motherboard.

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