Basic Input/Output System
I would like to make you familiar with BIOS on a computer. BIOS stands for Basic Input/ Output System. This is a program that is used by a microprocessor of a computer. It helps the computer to get started after turning the power button on.
It works as a coordinator between software (operating system) and hardware (attached devices) and acts an important role to communicate between software and hardware. BIOS are a program which is written on EPROM (erasable programmable read only memory). Basically, its function is to control data flow and plays its role as a mediator between software and hardware.
Following are the main functions of BIOS on a computer:
POST(Post is short for Power on Self-Test)
When you turn on your computer, BIOS performs a test check, the proper functionality of hardware attached or installed on your computer and if any errors or problem is detected in the hardware devices, it informs the user.
The bootstrap loader is a function of the BIOS which handover control to operating system after accessing to operating system available on the computer.
To enter into BIOS / CMOS Setup you have to press keys on your keyboard e.g some computers allow you to enter into bios by pressing an F8 key, F10 key Delete Key or any other key which is designed to enter the system by the company. Once you entered in the BIOS setup you can change the date, time, boot priorities, and hardware configuration etc. You can also apply the boot password or initial setup password which will ask the user to input password before starting its post