What is the purpose of BIOS?

What is the purpose of BIOS?

BIOS is an important part of the computer framework. It primary purpose is to initialize and test the system hardware components, as well as to load a boot loader or an operating system from memory. 

BIOS is usually pre-loaded on to the motherboard. It is typically loaded onto an erasable programmable read-only memory (EPROM) chip. When the computer it turned on, the BIOS is the first thing to boot up. Firstly, it determines whether all of the attachments are in place and are operational. It then loads the operating system from the hard disk to the random access memory (RAM), after which the RAM takes over.

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