Multiple Choice

Click on the correct response for each question below.

1		The command "cd" (change directory) will return an exit status.
			A)	1 for success
			B)	1 for failure
			C)	0 for failure
			D)	none of the above
2		What special variable has the exit status?
			A)	$?
			B)	$#
			C)	!$
			D)	$*
3		Another name for exit status is
			A)	Exit code
			B)	Return code
			C)	Return value
			D)	Quit value
4		Passing information between programs is called.
			A)	Program intertalk
			B)	Program communication
			C)	Interprocess communication
			D)	Task communication
5		A more complete means of communication between programs is called.
			A)	Flags
			B)	Chat
			C)	Email
			D)	Signals
6		Which of the following is necessary in order to send a signal?
			A)	There must be a way to send a signal.
			B)	There must be a way to identify a signal.
			C)	A signal trap must be available.
			D)	All of the above
7		A signal trap is a set of instructions
			A)	In the initiating process
			B)	In between the communicating processes
			C)	In the receiving process
			D)	None of the above
8		Which special variable contains the PID of its own process?
			A)	$job
			B)	$$
			C)	$
			D)	$ps
9		Each signal name begins with the letters
			A)	SIG
			B)	SIGNAL
			C)	SIGNAME
			D)	None of the above
10		Which signal is used to kill a running process?
			A)	Signal 2
			B)	Signal 9
			C)	Signal 15
			D)	Signal 1