With respect to computers, BIOS is an acronym for

ABinary Input Output Source

BBasic Input Output Support

CBinary Input Output System

DBasic Input Output System ✓ Correct

Correct answer: (D) Basic Input Output System

Explanation

BIOS expands to Basic Input Output System, the firmware that starts a computer and initialises its hardware before the operating system loads.

It is stored on a ROM chip on the motherboard so it is available the instant the machine powers on.

The other expansions mix up wrong words such as Binary, Source or Support and do not name the standard term.

At start-up the BIOS runs a power-on self-test to check that essential hardware is working.

It then locates the boot device and hands control to the operating system.

On modern computers the older BIOS has largely been replaced by UEFI firmware.

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