This questions are asked in an interview, pls ans this question...

[sbbalaji2004]

Hi friends,

I'm balaji, i've some doubts:
When PC starts, what processes will run first before it show the desktop?
when will GRUB load?



This questions are asked in an interview as System Admin.So i cant able to tell this answer. So can any of you please tell me what is the answer!!!!



please...........help me......

Balaji
sbbalaji2004@gmail.com
9951675793

[neverforgetniraj]

Hi ,
Balaji..

Hoping this answer may be answer to some part of ur quesiton...


When PC starts ... It perform Power On Self Test (POST) , to ensure RAM processor HDD etc, are working fine.

Then it checks

BIOS to locate bootable media.
If HDD ......reads the first sector information..
called as MBR.. which contains GRUB..


GRUB offers boot menu.. on selecting OS ,,, specific OS loaders are called,, which in turn loads the OS.

[oz]

Welcome to the forums, Balaji!

You might be driving some users away from replying with all the exaggerated text formatting. You can check this post for the reason why.

Best of luck with your interview.

[sbbalaji2004]

Hi ,
Balaji..

Hoping this answer may be answer to some part of ur quesiton...


When PC starts ... It perform Power On Self Test (POST) , to ensure RAM processor HDD etc, are working fine.

Then it checks

BIOS to locate bootable media.
If HDD ......reads the first sector information..
called as MBR.. which contains GRUB..


GRUB offers boot menu.. on selecting OS ,,, specific OS loaders are called,, which in turn loads the OS.

hi niraj,

thankyou for giving this valuable information.

but one small doubt,

is this procedure same for all Operating Systems(like Linuux) or only for windows??

In linux also POST will start first? or MBR will start first?

Balaji

[yancek]

In linux also POST will start first? or MBR will start first?

The Power-On-Self-Test is the same on all computers and has nothing to do with the operating system. If you just google "power on self test" , I'm sure you will find many pages with detailed explanations of how it works. The POST is run by chips on the motherboard and the master boot record is on your hard drive.