The process of pressing on the power button when the computer is switched off
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Answer:
Once pressing the power button; the machine goes through several internal processes before it's ready for you to use. This is called the boot process, the boot process is controlled by the PC's basic input-output system (BIOS)”software stored on a flash memory chip embedded on the motherboard”.
1- the switching power supply activates and starts supplying power to the PC, This allows each chip on the main board to power up into a hardware default state.
2- PC performs (POST) “power on self test” is a small computer program that check for hardware failures
PC Display attached Monitor showing details about the boot process.
3- the PC displays information on the attached monitor showing details about the boot process.
4- The BIOS attempts to access the first sector of the drive designated as the boot disk, that confirm there’s a boot loader in first sector of boot disk and it loads boot loader (small program designed to find and launch the PC OS) in RAM.
5- Once the boot loader is in memory, the BIOS hands over its work to the boot loader, which in turn begins loading the operating system into memory.
6- When it finish its task, it turns control of PC over to OS then OS ready for user interaction.
Explanation:
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