what is system call?

these are tiny programs which are attached with the operating system which are call automatically by the call of some specific processes.
These are type routines which are called via process itself.
For example suppose we have to give the copy command then it will automatically check the below informations
1. Is the source file is exist.
2. is there any content present in the source file.
3. Checking the destination file.
4. Is there enough space for copy.
5. is the content is rewritable or non-movable.

Functions Of Operating System

There are many functions of operating system.But the main function is to give a platform the work properly with high resource utilization and in a very fast mode.
It also works as a interface between hardware and software.System tools are also use to monitor the computer and interfacing.

Properties Of A Good Operating System

There are alots of operating system .It's very important to know which will be suitable
for u.There are few tips regarding operating system..
1->Check your requirements.
2->Check your capability to explore.
3->Check the present status of your system.
Many more thing which will be inform in next post
Takecare

About Windows Vista

Ok Guys U know very well about Window Vista.This was the measure project of Microsoft
after Windows XP.But it cannot success as much as XP.It' gave great lose to Microsoft.
So Microsoft again working and improving this operating system...

This is Anchal

Hello Friends this is Anchal from India, I am pursuing B.Tech from NOIDA with CS branch. I will talk about concepts of operating systems in here so keep looking.

Take care!