Linux Process Management 3

Question 1

In the output of 'ps aux', what does the 'S' state code indicate?

Accepted Answer

Sleeping (interruptible wait)

Answer

The 'S' state means the process is sleeping in an interruptible wait, ready to wake when its event or signal arrives.

Question 2

What does 'ulimit -n' control for a process?

Accepted Answer

Maximum number of open file descriptors

Answer

ulimit -n sets the maximum number of open file descriptors a process can hold simultaneously.

Question 3

Which system call does a process use to create a child process in Linux?

Accepted Answer

fork()

Answer

fork() creates a new child process as a copy of the parent; the child then often calls exec() to load a new program.

Question 4

What does 'nohup command &' accomplish?

Accepted Answer

Runs command immune to SIGHUP and detached from terminal

Answer

nohup ignores the SIGHUP signal (sent when a terminal closes) and & puts the process in the background, so it survives terminal logout.

Question 5

Which file in /proc shows a process's current memory map including shared libraries?

Accepted Answer

/proc/PID/maps

Answer

/proc/PID/maps lists all memory regions mapped by the process, including address ranges, permissions, and file mappings.

Linux Practice Test