The BIOS includes instructions on how to load basic computer hardware. The BIOS also includes a test referred to as a POST (Power On Self Test) which will ensure that the computer meets requirements to boot up properly. … BIOS – Software / Drivers which interfaces between the operating system and your hardware.

What is the difference between BIOS and POST?

The BIOS (Basic Input/Output System) is firmware stored in a chip on your computer’s motherboard. The BIOS performs the POST, which initializes and tests your computer’s hardware. … Then it locates and runs your boot loader, or loads your operating system directly.

Is POST before or after BIOS?

The BIOS begins its POST when the CPU is reset.