Linux+ and LPIC-1 Chapter 9

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

crontab pg 487

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

False

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

all instances of a process with the same name matched by a regular expression pg 475

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

daemon process pg 462

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

forking

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

init/systemd pg 463

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

parent process pg 462

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

renice -12 pg 481

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

−20 and 19 pg 480

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

ps pg 464

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

schedule processes to run at a single instance in the future pg 482

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

/var/spool/cron/username pg 487

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

top pg 470

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

9 pg 474

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

is a rogue process pg 471

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

jobs

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 users 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.

If /etc/at.allow exists, only users listed in it can use the at command. If /etc/cron.allow exists, only users listed in it can use the cron command. 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. pg 485-487

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.

There is a question mark in the TTY column. pg 466

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?

True pg 465

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.

You can use the Ctrl+z key combination and the bg command. pg 477