Linux Test 3- 7,8,9

Question 1

To prevent a file from being cleared by the BASH shell and append output to the existing output, you can specify three > metacharacters alongside the file descriptor.

Answer 1

F

Question 2

You are limited to using one pipe | metacharacter on the command line to pipe information from one command to another command.

Answer 2

F

Question 3

You can use the sed command to remove unwanted lines of text.

Answer 3

T

Question 4

Any command that can be executed on the command line can also be placed inside any environment file.

Answer 4

T

Question 5

Given the syntax command && command, the command on the left of the && construct is executed only if the command on the right of the && construct completed successfully.

Answer 5

F

Question 6

The BASH shell assumes stdout in the absence of a numeric file descriptor

Answer 6

T

Question 7

Users can create their own custom variables, called shell variables

Answer 7

F

Question 8

The ENV environment variable represents the location of the BASH run-time configuration file.

Answer 8

T

Question 9

Aliases are shortcuts to commands stored in special variables that can be created and viewed using the alias command.

Answer 9

T

Question 10

In a decision construct, you can have an unlimited number of if then statements.

Answer 10

F

Question 11

The file descriptor stdin is represented by the number ____.

Answer 11

0

Question 12

The file descriptor stderr is represented by the number ____.

Answer 12

2

Question 13

You can use the BASH shell to redirect standard output and standard error from the terminal screen to a file on the filesystem using the ____ shell metacharacter followed by the absolute or relative pathname of the file

Answer 13

>

Question 14

You can redirect a file to the standard input of a command using the ____ metacharacter.

Answer 14

<

Question 15

The ____ command can be used to replace characters in a file sent via Standard Input.

Answer 15

tr

Question 16

You can send the standard output of one command to another command as standard input using the ____ shell metacharacter.

Answer 16

|

Question 17

The ____ command counts the number of lines, words, and characters in a file.

Answer 17

wc

Question 18

The ____ command can be used to extract, manipulate, and format text using pattern-action statements.

Answer 18

awk

Question 19

Most configuration files on Linux systems are delimited using ____ characters.

Answer 19

colon

Question 20

To see a list of the environment variables and their current values on a system, you can use the ____ command.

Answer 20

set

Question 21

The ____ command could be used to view the contents of the environment variable that represents the BASH shell prompt.

Answer 21

echo $PS1

Question 22

To see a list of all exported environment and user-defined variables in the shell, you can use the ____ command.

Answer 22

env

Question 23

The ____ environment file is always executed immediately after login for all users on the system, and sets most environment variables, such as HOME and PATH.

Answer 23

/etc/profile

Question 24

If you have ____ permission to a shell script, you can execute the shell script like any other executable program on the system.

Answer 24

read and execute

Question 25

The ____ escape sequence represents a form feed.

Answer 25

\f

Question 26

The test statement ____ would be used to determine if A is numerically greater than B.

Answer 26

[ A -gt B ]

Question 27

Are both standard output and standard error displayed on the terminal screen by default?

Answer 27

Y

Question 28

When redirecting both standard output and standard error to a file, does using the same filename for both result in a loss of data?

Answer 28

Y

Question 29

Can the redirection shell metacharacter be used to redirect between a command and another command?

Answer 29

N

Question 30

When performing a pipe, do you need to have spaces around the | metacharacter?

Answer 30

N

Question 31

Can you combine redirection and piping together?

Answer 31

Y

Question 32

GRUB must be reinstalled after editing its configuration file.

Answer 32

f

Question 33

If you are using a Linux boot loader to dual boot another operating system in addition to Linux, it is easiest if Linux is installed after the other operating system has been installed.

Answer 33

t

Question 34

The /etc/rc.d/rc 5 script only executes files that start with S in the /etc/rc.d/rc5.d/ directory.

Answer 34

f

Question 35

Most daemon scripts accept the arguments start, stop, and restart.

Answer 35

t

Question 36

You can choose to use a window manager only, and not use a desktop manager.

Answer 36

t

Question 37

Using one boot loader to boot one of several operating systems is known as multi-booting.

Answer 37

f

Question 38

LILO is the most common boot loader used on modern Linux systems and the only boot loader supported by Fedora 13

Answer 38

f

Question 39

To see the current runlevel of the system and the previous runlevel (if runlevels have been changed since system startup), you can use the runlevel command.

Answer 39

t

Question 40

Administrators most commonly use a(n) graphical user interface.

Answer 40

f

Question 41

The core component of a Linux GUI is X Windows.

Answer 41

t

Question 42

The Linux kernel is stored in the ____ directory.

Answer 42

/boot

Question 43

____ of the GRUB boot loader typically resides on the Master Boot Record.

Answer 43

Stage1

Question 44

To create an encrypted password for use in the /boot/grub/grub.conf, you can use the ____ command

Answer 44

grub-md5-crypt

Question 45

In the /etc/lilo.conf file, the ____ keyword specifies the absolute pathname to the Linux kernel.

Answer 45

image=

Question 46

In the /etc/lilo.conf file, the ____ keyword specifies the file that contains the physical layout of the disk drive.

Answer 46

install=

Question 47

In Linux, runlevel ____ is also known as multiuser mode.

Answer 47

2

Question 48

A Linux system in runlevel ____ is a system that has no daemons active in memory and is ready to be powered off

Answer 48

0

Question 49

After the entries in /etc/inittab have been executed, the ____ file is executed to perform tasks that must occur after system startup.

Answer 49

/etc/rc.d/rc.local

Question 50

You can use the ____ command to start, stop, or restart any daemons listed within the /etc/rc.d/init.d directory.

Answer 50

service

Question 51

Which utility can be used to modify runtime configuration files so that they start and stop daemons when entering a particular runlevel?

Answer 51

ntsysv

Question 52

____ is a freely available version of X Windows used in many Linux distributions.

Answer 52

XFree86

Question 53

The two most common desktop environments that are used on Linux are ____ and ____.

Answer 53

KDE, GNOME

Question 54

The ____ window manager is used for the GNOME desktop in Red Hat Fedora Core 2

Answer 54

metacity

Question 55

If your system uses the X.org implementation of X Windows, the mouse, keyboard, monitor, and video adapter card information is stored in the ____ file in text format.

Answer 55

/etc/X11/xorg.conf

Question 56

To configure your keyboard, you can use the ____ command from either a GUI or terminal environment and restart X Windows.

Answer 56

system-config-keyboard

Question 57

After configuring X Windows, you can fine-tune the vsync and hsync of the video card using the ____ utility within the desktop environment.

Answer 57

xvidtune

Question 58

Can there be more than one active partition on a hard disk?

Answer 58

no

Question 59

Can LILO boot a Windows kernel directly?

Answer 59

no

Question 60

Can you use a Windows boot loader to load the Linux operating system?

Answer 60

yes

Question 61

Do X clients need to run on the same computer as X Windows?

Answer 61

no

Question 62

If you use runlevel 3, can you start the GNOME Display Manager manually?

Answer 62

yes

Question 63

Each process can start an unlimited number of other processes

Answer 63

t

Question 64

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

Answer 64

f

Question 65

The killall command uses the PID to kill a process.

Answer 65

f

Question 66

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

Answer 66

t

Question 67

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.

Answer 67

t

Question 68

The init daemon has a PID of 0

Answer 68

f

Question 69

While a process is waiting for its parent process to release the PID, the process is said to be in a(n) zombie state

Answer 69

t

Question 70

A value of 0 for a process priority indicates low priority

Answer 70

f

Question 71

The SIGINT kill signal is the default kill signal used by the kill command.

Answer 71

f

Question 72

Most commands such as ls, find, and grep are binary programs that exist on the filesystem until executed

Answer 72

t

Question 73

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

Answer 73

daemon

Question 74

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

Answer 74

-e

Question 75

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.

Answer 75

process state

Question 76

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

Answer 76

x

Question 77

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

Answer 77

64

Question 78

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

Answer 78

SIGHUP

Question 79

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.

Answer 79

SIGQUIT

Question 80

You can execute ____ main types of Linux commands

Answer 80

3

Question 81

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

Answer 81

&

Question 82

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

Answer 82

%

Question 83

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

Answer 83

fg

Question 84

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

Answer 84

+

Question 85

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

Answer 85

0

Question 86

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

Answer 86

-l

Question 87

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

Answer 87

sixth

Question 88

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

Answer 88

-e

Question 89

Can a process have multiple parent processes?

Answer 89

no

Question 90

Does a negative nice value give a process a greater chance of a lower priority?

Answer 90

no

Question 91

Can the top command be used to change the priority of processes?

Answer 91

yes

Question 92

Can the SIGKILL kill signal be trapped by a process?

Answer 92

no

Question 93

If you send a kill signal to a process that has children, are the child processes terminated?

Answer 93

yes

Question 94

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

Answer 94

process

Question 95

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

Answer 95

nice value

Question 96

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

Answer 96

rogue

Question 97

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.

Answer 97

forking

Question 98

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

Answer 98

time slice

Question 99

An executable file on the hard disk that can be run when you execute it.

Answer 99

program

Question 100

Daemon used to schedule a command to execute once in the future.

Answer 100

at daemon

Question 101

The location of system cron tables.

Answer 101

/etc/crontab

Question 102

Directory storing the shell environment and scheduled commands.

Answer 102

/var/spool/at

Question 103

The location of user cron tables

Answer 103

/var/spool/cron

Question 104

A process’s identifier that allows the kernel to identify it uniquely

Answer 104

PID

Question 105

Identifies the process that started another process.

Answer 105

PPID

Question 106

Daemon used to schedule a command to execute repeatedly in the future.

Answer 106

cron daemon

Question 107

Ignoring a kill signal

Answer 107

trapping