Microsoft Exam 98-365 Topic 1 Question 21 Discussion

The four main functions of a PC BIOS (Basic Input/Output System).

POST - Test the computer hardware and make sure no errors exist before loading the operating system. Additional information on the POST can be found on our POST and Beep Codes page.

Bootstrap Loader - Locate the operating system. If a capable operating system is located, the BIOS will pass control to it.

BIOS drivers - Low level drivers that give the computer basic operational control over your computer's hardware.

BIOS or CMOS Setup- -Configuration program that allows you to configure hardware settings including system settings such as computer passwords, time, and date.