. How will we run a process in background? How will we bring that into foreground and how will you kill that process?

Answer

For running a process in background use "&" in command line. For bringing it back in foreground use command "fg jobid" and for getting job id we use command "jobs", for killing that process find PID and use kill -9 PID command. This is indeed a good Unix Command interview questions because many of programmer not familiar with background process in UNIX.