Process Model and IPC Interview questions

Total available count: 17
Subject - Operating System
Subsubject - Process Model and IPC

What happens when you execute a command?

When you enter 'ls' command to look at the contents of your current working directory, UNIX does a series of things to create an environment for ls and the run it: The shell has UNIX perform a fork. This creates a new process that the shell will use to run the ls program. The shell has UNIX perform an exec of the ls program. This replaces the shell program and data with the program and data for ls and then starts running that new program. The ls program is loaded into the new process context, replacing the text and data of the shell. The ls program performs its task, listing the contents of the current directory.

Next 5 interview question(s)

What is a Daemon?
What is ps command for?
How would you kill a process?
What is an advantage of executing a process in background?
How do you execute one program from within another?