Bios and Its Function | CAAN Senior Assistant IT | 078 question paper

Q.  What is BIOS? Briefly discuss its  functions. (1+4) marks

answer: 

The BIOS, which stands for Basic Input/output System is a piece of software, normally stored in non-volatile memory (flash) or ROM (Read-Only Memory).

The functions of BIOS can be mentioned in following points:

CMOS and BIOS first check the settings between each other; later the computer is turned on, all settings in CMOS are read and executed.

The BIOS then loads a computer driver to interface between the operating system and connected devices.

BIOS then clean up all the CPU registers and make them ready for use.

Afterward, the BIOS check all the hardware devices, including the keyboard and mouse, and test them, a process known as POST or Power-on Self-Test.

During the POST process, you press a special key with the help of keyboard by which a set of settings appear in front of you, which is known as the BIOS setting.

This is the first setting that the BIOS load.

Later finds a BOOTABLE medium, it loads essential files into the RAM, and then the computer is on, and we are able to view the desktop.

Apart from this, It saves the most important basic input and output programs of the computer, system settings and the self-checking and self-triggered programs. The main function of it is to provide the basic and direct hardware settings and controls to the device.

The most important function of BIOS is to boot the operating system of the computer. When the computer is on, then BIOS performs the task such as decide from which device system  is the boot, conduct power-on-self-test and so on.

Thank You for reading. If it needs to be more corrected please comment. I will try to improve the answer. Feedbacks are always welcome.  Stay Safe