Answer / k.s.naidu

A system call is the mechanism used by an application
program to request service from the operating system.

On Unix-based and POSIX-based systems, popular system
calls are open, read, write, close, wait, exec, fork, exit,
and kill. Many of today's operating systems have hundreds of
system calls. For example, Linux has 319 different system
calls. FreeBSD has about the same (almost 330).

Tools such as strace and truss report the system calls made
by a running process.

Answer / sripati

A system call is a request for the operating system to do
something on behalf of the user's program.The system calls
are functions used in the kernel itself.system calls are
used to manage the file system, control processes and to
provide interprocess communication.

Answer / nic

System call is call Made by System

Answer / sushil

OS function or subroutine which can be called by user
program , optionaaly it can pass arguments to the function,
is called system call

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1 Answers  

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