Free What the OS does lessonsWhat the OS does · Stage 1 · Programs and processes · Step 4
From power-on to a running OS
Follow the boot sequence: firmware, bootloader, kernel, and the first process. About 10 minutes.
Which is the first code to run when a computer is switched on?
- AThe firmware (BIOS or UEFI) on the motherboard
- BThe operating system's kernel
- CThe init process
Show the answer
The firmware (BIOS or UEFI) on the motherboard. It's the only code available before anything has been loaded from disk.
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