Which of the following action can be taken by a process upon receiving a signal?

ignore the signal, terminate and suspend the process

Which of the following comments about the signals system call are true?

The first argument is an integer

The second argument is a pointer to a function

Choose the correct statement.

Any process has an associated owner ID and group ID

Effective ID defines who you are for the duration of a process

Real ID defines who you are for the duration of a process

The "nice" command is used to

Change Priority levels of running processes

By default, "ps" will list

All processes running in your account

Only processes running in that terminal

What does the following command do?$ kill %2

kills the second background job

kill all foreground & background jobs

The "ps" command gives you a

Dynamic view of running processes

Static view of running processes

Dynamic view of running processes

Has nothing to do with processes

Method of moving processes to the background

The sources from where the signals can be generated are:

keyboard, hardware, a C program

What will the output of the following command?$ ps -t dev/console

processes running on terminal named console

processes running on the current terminal

48 + Mcqs in Jobs and Processes in Unix Page 1 McqOptions

1.	If two users execute the same program, the memory requirements are doubled.
A.	True
B.	False
C.	May be
D.	Can't say
Answer» C. May be

Discussion

2.	Which of the following action can be taken by a process upon receiving a signal?
A.	ignore the signal
B.	terminate the process
C.	suspend the process
D.	ignore the signal, terminate and suspend the process
Answer» E.

Discussion

3.	We cannot find out the name of the program scheduled using at command.
A.	True
B.	False
C.	May be
D.	Can't say
Answer» B. False

Discussion

4.	Kill -l will list all the signal numbers on our machine.
A.	True
B.	False
C.	May be
D.	Can't say
Answer» B. False

Discussion

5.	The environment variables are available in _____
A.	*environ[ ]
B.	env[ ]
C.	env
D.	pipe
Answer» B. env[ ]

Discussion

6.	Which of the following signals are generated from the hardware?
A.	SIGFPE
B.	SIGILL
C.	SIGSEGV
D.	SIGPE, SIGILL, SIGSEGV
Answer» E.

Discussion

7.	Which of the following functions are used for obtaining and setting the value of environment variables?
A.	getenv
B.	setenv
C.	env
D.	getenv and setenv
Answer» E.

Discussion

8.	Every process running on the system has a
A.	Permissions
B.	Process ID
C.	Both a and b
D.	Background job
Answer» C. Both a and b

Discussion

9.	Processes with a nice level of -20
A.	are least nice
B.	are very nice
C.	are kind of nice
D.	are the nicest
Answer» B. are very nice

Discussion

10.	The parent process picks up the exit status of a child using ___ system call.
A.	wait
B.	waitp
C.	exec
D.	kill
Answer» B. waitp

Discussion

11.	The PID of our login shell doesn’t change.
A.	True
B.	False
C.	May be
D.	Can't say
Answer» C. May be

Discussion

12.	A process can be terminated using the exit or _exit system call.
A.	True
B.	False
C.	May be
D.	Can't say
Answer» B. False

Discussion

13.	Which of the following is not a job status?
A.	Idling
B.	Running
C.	Stopped
D.	Done
Answer» B. Running

Discussion

14.	Both exit and _exit system call share an identical syntax.
A.	True
B.	False
C.	May be
D.	Can't say
Answer» B. False

Discussion

15.	Address space of a process is virtual.
A.	True
B.	False
C.	May be
D.	Can't say
Answer» B. False

Discussion

16.	To start a process in the background, enter the command with this character at the end.
A.	$
B.	#
C.	&
D.	%
Answer» D. %

Discussion

17.	Which system call is used to set a timer that generates the SIGALARM signal?
A.	pause
B.	alarm
C.	read
D.	signal
Answer» C. read

Discussion

18.	nohup command doesn’t send the standard output of a command to any file.
A.	True
B.	False
C.	May be
D.	Can't say
Answer» C. May be

Discussion

19.	Which of the following commands are useful to job and process management?
A.	Jobs
B.	Ps
C.	Top
D.	All of the above
Answer» E.

Discussion

20.	A process is an instance of _______ program.
A.	waiting
B.	executing
C.	terminated
D.	halted
Answer» C. terminated

Discussion

21.	Which of the following characteristics of the original process are preserved when, the exec system call is executed
A.	The current working directory
B.	The open files
C.	PID and PPID
D.	All of these
Answer» E.

Discussion

22.	Which of the following comments about the signals system call are true?
A.	It takes up two arguments
B.	The first argument is an integer
C.	The second argument is a pointer to a function
D.	All of the above
Answer» E.

Discussion

23.	Choose the correct statement.
A.	Any process has an associated owner ID and group ID
B.	Effective ID defines who you are for the duration of a process
C.	Real ID defines who you are for the duration of a process
D.	Both (a) & (b)
Answer» E.

Discussion

24.	It is better to use & with nice command.
A.	True
B.	False
C.	May be
D.	Can't say
Answer» B. False

Discussion

25.	Each process is identified by a unique integer called ______
A.	PID
B.	PPID
C.	TID
D.	PTID
Answer» B. PPID

Discussion

26.	The "renice" command needs these arguments.
A.	Nice level and process id
B.	Program name and nice level
C.	Job number and process id
D.	Job number and nice level
Answer» B. Program name and nice level

Discussion

27.	Which of the following system calls returns one or more file descriptors?
A.	dup, dup2
B.	fcntl
C.	pipe
D.	dup, dup2, fcntl and pipe
Answer» E.

Discussion

28.	The cron tab is a table having a list of commands that are scheduled to be run at regular intervals.
A.	True
B.	False
C.	May be
D.	Can't say
Answer» B. False

Discussion

29.	Every process has a parent process.
A.	True
B.	False
C.	May be
D.	Can't say
Answer» B. False

Discussion

30.	Jobs scheduled using batch command goes to a special at queue.
A.	True
B.	False
C.	May be
D.	Can't say
Answer» B. False

Discussion

31.	The method used by Unix to do multitasking is called
A.	task switching
B.	time switching
C.	time slicing
D.	processor sharing
Answer» D. processor sharing

Discussion

32.	What is the default disposition of most signals?
A.	ignore the signal
B.	terminate the process
C.	suspend the process
D.	kill the signal
Answer» C. suspend the process

Discussion

33.	The "nice" command is used to
A.	Communicate with other users
B.	Improve relationships
C.	Change Priority levels of running processes
D.	Create processes
Answer» D. Create processes

Discussion

34.	The parent id of a child is called ______
A.	PID
B.	PPID
C.	TID
D.	PTID
Answer» C. TID

Discussion

35.	By default, "ps" will list
A.	All processes running in your account
B.	Only processes running in that terminal
C.	All processes for all users
D.	Processes for other users only
Answer» C. All processes for all users

Discussion

36.	POSIX shell provides job control facilities like bg or fg.
A.	True
B.	False
C.	May be
D.	Can't say
Answer» C. May be

Discussion

37.	___ system call behaves in an identical manner to the kill command.
A.	alarm
B.	kill
C.	pause
D.	signal
Answer» C. pause

Discussion

38.	What does the following command do?$ kill %2
A.	kills job number 2
B.	kills the second background job
C.	invalid command
D.	kill all foreground & background jobs
Answer» C. invalid command

Discussion

39.	Which of the following functions is used for handling environment variables of a process?
A.	getenv
B.	setenv
C.	letenv
D.	getenv and setenv
Answer» E.

Discussion

40.	Which library function uses kill to send any signal to the current process?
A.	getc
B.	raise
C.	catch
D.	try
Answer» C. catch

Discussion

41.	The "ps" command gives you a
A.	Static view of running processes
B.	Dynamic view of running processes
C.	Has nothing to do with processes
D.	Method of moving processes to the background
Answer» B. Dynamic view of running processes

Discussion

42.	Which of the following signals can neither be ignored nor catch?
A.	SIGKILL
B.	SIGSTOP
C.	SIGKILL and SIGSTOP
D.	SIGALR
Answer» D. SIGALR

Discussion

43.	There are _____ signals that are generated from the keyboard.
A.	2
B.	3
C.	1
D.	5
Answer» C. 1

Discussion

44.	The sources from where the signals can be generated are:
A.	keyboard
B.	hardware
C.	a C program
D.	keyboard, hardware, a C program
Answer» E.

Discussion

45.	A system call is a programmatic way in which the program requests for the service from the kernel of an operating system.
A.	True
B.	False
C.	May be
D.	Can't say
Answer» B. False

Discussion

46.	What will the output of the following command?$ ps -t dev/console
A.	processes running on terminal named console
B.	undefined output
C.	erroneous
D.	processes running on the current terminal
Answer» B. undefined output

Discussion

47.	The -a option when used with ps command lists processes of all users but doesn’t display the system processes.
A.	True
B.	False
C.	May be
D.	Can't say
Answer» B. False

Discussion

48.	When fork() is invoked, the child process created gets a new PID.
A.	True
B.	False
C.	May be
D.	Can't say
Answer» B. False

Discussion

Explore topic-wise MCQs in Unix.

If two users execute the same program, the memory requirements are doubled.

Which of the following action can be taken by a process upon receiving a signal?

We cannot find out the name of the program scheduled using at command.

Kill -l will list all the signal numbers on our machine.

The environment variables are available in _____

Which of the following signals are generated from the hardware?

Which of the following functions are used for obtaining and setting the value of environment variables?

Every process running on the system has a

Processes with a nice level of -20

The parent process picks up the exit status of a child using ___ system call.

The PID of our login shell doesn’t change.

A process can be terminated using the exit or _exit system call.

Which of the following is not a job status?

Both exit and _exit system call share an identical syntax.

Address space of a process is virtual.

To start a process in the background, enter the command with this character at the end.

Which system call is used to set a timer that generates the SIGALARM signal?

nohup command doesn’t send the standard output of a command to any file.

Which of the following commands are useful to job and process management?

A process is an instance of _______ program.

Which of the following characteristics of the original process are preserved when, the exec system call is executed

Which of the following comments about the signals system call are true?

Choose the correct statement.

It is better to use & with nice command.

Each process is identified by a unique integer called ______

The "renice" command needs these arguments.

Which of the following system calls returns one or more file descriptors?

The cron tab is a table having a list of commands that are scheduled to be run at regular intervals.

Every process has a parent process.

Jobs scheduled using batch command goes to a special at queue.

The method used by Unix to do multitasking is called

What is the default disposition of most signals?

The "nice" command is used to

The parent id of a child is called ______

By default, "ps" will list

POSIX shell provides job control facilities like bg or fg.

___ system call behaves in an identical manner to the kill command.

What does the following command do?$ kill %2

Which of the following functions is used for handling environment variables of a process?

Which library function uses kill to send any signal to the current process?

The "ps" command gives you a

Which of the following signals can neither be ignored nor catch?

There are _____ signals that are generated from the keyboard.

The sources from where the signals can be generated are:

A system call is a programmatic way in which the program requests for the service from the kernel of an operating system.

What will the output of the following command?$ ps -t dev/console

The -a option when used with ps command lists processes of all users but doesn’t display the system processes.

When fork() is invoked, the child process created gets a new PID.