Module 9 Review Quiz

Question 1

Which command entered without arguments is used to display a list of processes running in the current shell?
a. pgrep
b. list
c. pid
d. ps

Answer 1

d. ps

Question 2

Which of the following statements is true? (Choose all that apply.)

a. If /etc/at.allow exists, only users listed in it can use the at command.

b. If /etc/cron.allow exists, only users listed in it can use the cron command.

c. If /etc/cron.deny exists and /etc/cron.allow does not exist, any user not listed in /etc/cron.deny can use the cron command.

d. If /etc/cron.allow and /etc/cron.deny exist, only users listed in the former can use the cron command and any listed in the latter are denied access to the cron command.

e. If a user is listed in both /etc/cron.allow and /etc/cron.deny, then /etc/cron.deny takes precedence and the user cannot access the crontab command.

Answer 2

a. If /etc/at.allow exists, only users listed in it can use the at command.

b. If /etc/cron.allow exists, only users listed in it can use the cron command.

c. If /etc/cron.deny exists and /etc/cron.allow does not exist, any user not listed in /etc/cron.deny can use the cron command.

Question 3

Where are individual user tasks scheduled to run with the cron daemon stored on a Fedora system?
a. /etc/crontab
b. /etc/cron/username
c. /var/spool/cron
d. /var/spool/cron/username

Answer 3

d. /var/spool/cron/username

Question 4

Which process has a PID of 1 and a PPID of 0?
a. the kernel itself
b. ps
c. init/systemd
d. top

Answer 4

c. init/systemd

Question 5

A process spawning or initiating another process is referred to as _____.
a. a child process
b. forking
c. branching
d. parenting

Answer 5

b. forking

Question 6

As daemon processes are not associated with terminals, you must use an option such as –e alongside the ps command to view them. True or False?
a. True
b. False

Answer 6

a. True

Question 7

Which of the following commands will most likely increase the chance of a process receiving more time slices?
a. renice 0
b. renice 15
c. renice -12
d. renice 19

Answer 7

c. renice -12

Question 8

How can you bypass the wait function and send a user process to the background?

a. This cannot happen once a process is executing; it can be done only when the command is started by placing an ampersand (&) after it.

b. This cannot happen; only daemon processes can run in the background.

c. You can use the ps command.

d. You can use the Ctrl+z key combination and the bg command.

Answer 8

d. You can use the Ctrl+z key combination and the bg command.

Question 9

The at command is used to _______________.

a. schedule processes to run periodically in the background

b. schedule processes to run periodically on a recurring basis in the future

c. schedule processes to run at a single instance in the future

d. schedule processes to run in the foreground

Answer 9

c. schedule processes to run at a single instance in the future

Question 10

What command is used to view and modify user jobs scheduled to run with cron?
a. crontab
b. cron
c. ps
d. sched

Answer 10

a. crontab

Question 11

Every process has a process ID and a_______.
a. fork process
b. daemon
c. child process
d. parent process ID

Answer 11

d. parent process ID

Question 12

The pkill command terminates _________.

a. all instances of a process with the same PPID

b. all instances of a process with the same PID

c. all instances of a process with the same priority

d. all instances of a process with the same name matched by a regular expression

Answer 12

d. all instances of a process with the same name matched by a regular expression

Question 13

Nice values are used to affect process priorities using a range between _____________.
a. 0 and 20
b. 0 and -19
c. –19 and 20
d. –20 and 19

Answer 13

d. –20 and 19

Question 14

What is the name given to a process not associated with a terminal?
a. child process
b. parent process
c. user process
d. daemon process

Answer 14

d. daemon process

Question 15

To kill a process running in the background, you must place a % character before its process ID. True or False?
a. True
b. False

Answer 15

b. False

Question 16

What kill level signal cannot be trapped?
a. 1
b. 9
c. 3
d. 15

Answer 16

b. 9

Question 17

A runaway process that is faulty and consuming mass amounts of system resources ________.
a. is a zombie process
b. is an orphaned process
c. has a PPID of Z
d. is a rogue process

Answer 17

d. is a rogue process

Question 18

Which command is used to gain real-time information about processes running on the system, with the most processor-intensive processes listed at the beginning of the list?
a. ps
b. ps -elf
c. top
d. pstree

Answer 18

c. top

Question 19

When you run the ps command, how are daemon processes recognized?

a. The terminal is listed as tty0.

b. There is a question mark in the TTY column.

c. There is an asterisk in the STIME column.

d. There is a “d” for daemon in the terminal identification column.

Answer 19

b. There is a question mark in the TTY column.

Question 20

Which command can be used to see processes running in the background?
a. bg
b. jobs
c. ps -%
d. fg

Answer 20

b. jobs