Review 3-3 Linux+ Processes

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

False

As daemon processes are not associated with terminals, you must use an options such as -e with the ps command to view them. True False

True

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

/var/spool/cron/username

What kill level signal cannot be trapped? 1 3 9 15

9

What creates a process under Linux? Execution of a command utility. Running a shell script. Running a shell builtin command. All of the above Both answers A and B are correct.

Both answers A and B are correct.

What system calls are made when you run a program from the command line? fork() and exec() init() and bash() process() and exec() ps() and init()

fork() and exec()

Which process has a PID of 1 and a PPID of 0? The operating system kernel init/systemd Ps Top

init/systemd

Which command can be used to see processes running in the background? Bg Jobs Ps -% Fg

jobs

What command shows a list of the current processes Linux is executing? ps process set get

ps

A process spawning or initiating another process is referred to as________. A child process Forking Branching Parenting

Forking

Every process has a process ID and a __________. Parent process ID Fork process Daemon Child process

Parent process ID

What is a PID? Personal Identification code Process Identification Number Program Initiation Designation Number Parent Identification Number

Process Identification Number

What command is used to view and modify user jobs scheduled to run with cron? crontab cron ps sched

crontab

The pkill command terminates ____________. All instances of a process with the same PPID. All instances of a process with the same name matched by a regular expression. All instances of a process with the same PID. All instances of a process with the same priority.

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

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

A runaway process that is faulty and consuming mass amount of system resources _________________. Is a zombie process Is an orphaned process Has a PPID of Z Is a rogue process.

Is a rogue process.

When you run the ps command, how are daemons process recognized? The terminal is listed as tty0 There is a question mark in the TTY column There is an asterisk in the STIME column. There is a "d" for daemon in the terminal identification column.

There is a question mark in the TTY column

How can you bypass the wait function and send a user process to the background? This cannot happen once a process is executing; it can be done only when the command is started by placing an ampersand (&) after it. This cannot happen; only daemon processes can run in the background. You can use the ps command. You can use the Ctrl+z key combination and the bg command.

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

Which command entered without arguments is used to display a list of processes running in the currents shell? Pgrep List Pid Ps

ps

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? Ps Top Ps -elf Pstree

Top

What is the symbol that creates a pipe between commands? Greater than sign (>) Less than sign (<) Tilde (~) Colon (:) None of the above

None of the above

Nice values are used to affect process priorities using a range betwen ________________________. 0 and 20 0 and -19 -19 and 20 -20 and 19

-20 and 19

What is the name of a process not associated with a terminal? Child process. Daemon process. User process Parent process

Daemon process.

The at command is used to ________. Schedule processes to run periodically in the background. Schedule processes to run periodically on a recurring basis in the future. Schedule processes to run at a single instance in the future. Schedule processes to run in the foreground.

Schedule processes to run at a single instance in the future.

A Linux process is a program that is running in memory and the CPU. True False

True

What is the name of the root process under Linux? root init parent login

init

Which of the following commands will most likely increase the chance of a process receiving more time slices? Renice 0 Renice 15 Renice -12 Renice 19

renice -12