Deck 10: Managing Linux Processes

Question 1

After a process has been started, you can change its priority by using the renice command.

Answer 1

True

Question 2

In the output of the ps -l command, the ____ column is the most valuable to systems administrators because it indicates what the process is currently doing.

A)process state
B)process flag
C)process priority
D)PID

Answer 2

A

Question 3

When you append a(n)____ to a command, the command is run in a background process.

A)&
B)$
C)#
D)%

Answer 3

A

Question 4

The ____ option to the ps command displays all processes that do not run on terminals, but not processes that run on terminals.

A)-f
B)x
C)a
D)-l

Question 5

The ____ kill signal terminates a process by taking the process information in memory and saving it to a file called core on the hard disk in the current working directory.

A)SIGINT
B)SIGQUIT
C)SIGKILL
D)SIGTERM

Question 6

To display an entire list of processes across all terminals and including daemons, you can add the ____ option to any ps command.

A)-f
B)-l
C)-a
D)-e

Question 7

The ____ field in a cron table contains the absolute pathname to the command to be executed.

A)first
B)second
C)fifth
D)sixth

Question 8

You can execute ____ main types of Linux commands.

A)2
B)3
C)4
D)5

Question 9

There are ____ different kill signals that the kill command can send to a certain process.

A)16
B)32
C)64
D)128

Question 10

The ps command is the only command that can view process information.

Question 11

The ____ kill signal stops a process then restarts it with the same PID.

A)SIGINT
B)SIGQUIT
C)SIGHUP
D)SIGTERM

Question 12

The killall command uses the PID to kill a process.

Question 13

When there are multiple background processes executing in the shell, the jobs command indicates the most recent one with a(n)____ symbol.

A)*
B)+
C)-
D)/

Question 14

Each process can start an unlimited number of other processes.

Question 15

When killing a background job with the kill command, you must prefix the background job IDs by a(n)____.

A)&
B)#
C)$
D)%

Question 16

To display a list of at Job IDs, you can specify the ____ option to the at command:

A)-l
B)-u
C)-a
D)-d

Question 17

After a background process has been started, it can be moved to the foreground by using the ____ command.

A)b2f
B)fgd
C)fg
D)fgnd

Question 18

If the /etc/at.allow and /etc/at.deny files do not exist, only the root user is allowed to schedule tasks using the at daemon.

Question 19

A system process that is not associated with a terminal is called a(n)____.

A)daemon
B)user
C)parent
D)startup

Question 20

Processes are started with a nice value of ____ by default.

A)-20
B)0
C)1
D)19

Question 21

What is forking?

Question 22

Describe the system cron table. How it is organized, and what information may be contained within it?

Question 24

Processes that have encountered an error during execution and continuously uses up system resources are referred to as ____________________ processes.

Question 25

In a process referred to as ____________________, when executing compiled programs or shell scripts, the BASH shell that interprets the command you typed creates a new BASH shell.

Question 26

The amount of time a process has to use the CPU is called a(n)____________________ .

Question 27

The ____________________ can be used to affect the process priority indirectly.

Question 28

How does the nice value affect process priority? How and why can nice values be altered?

Question 29

Why would you want to schedule commands? What methods are available for scheduling commands?

Question 30

Describe the purpose the process state column displayed by the ps -l command. What values may appear in this column, and what do these values indicate?

Question 31

To create or edit a user cron table, you can use the ____ option to the crontab command.

A)-u
B)-c
C)-f
D)-e

Question 32

A(n)____________________ refers to a program that is running in memory and on the CPU.