101-400 Online Training Archives

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1. Which SysV init configuration file should be modified to disable the ctrl-alt-delete key combination?

/etc/keys

/proc/keys

/etc/inittab

/proc/inittab

/etc/reboot

2. During a system boot cycle, what program is executed after the BIOS completes its tasks?

The bootloader

The inetd program

The init program

The kernel

3. Which run levels should never be declared as the default run level when using SysV init? (Choose TWO correct answers.)

4. Which of the following statements is correct when talking about /proc/?

All changes to files in /proc/ are stored in /etc/proc.d/ and restored on reboot.

All files within /proc/ are read-only and their contents cannot be changed.

All changes to files in /proc/ are immediately recognized by the kernel.

All files within /proc/ are only readable by the root user.

5. What of the following statements are true regarding /dev/ when using udev? (Choose TWO correct answers.)

Entries for all possible devices get created on boot even if those devices are not connected.

Additional rules for udev can be created by adding them to /etc/udev/rules.d/.

When using udev, it is not possible to create block or character devices in /dev/ using mknod.

The /dev/ directory is a filesystem of type tmpfs and is mounted by udev during system startup.

The content of /dev/ is stored in /etc/udev/dev and is restored during system startup.

6. Which of the following information is stored within the BIOS? (Choose TWO correct answers.)

Boot device order

Linux kernel version

Timezone

Hardware configuration

The system's hostname

7. Which of the following commands reboots the system when using SysV init? (Choose TWO correct answers.)

shutdown -r now

shutdown -r "rebooting"

telinit 6

telinit 0

shutdown -k now "rebooting"

8. Which of the following are init systems used within Linux systems? (Choose THREE correct answers.)

startd

systemd

Upstart

SysInit

SysV init

9. CORRECT TEXT

Which file in the /proc filesystem lists parameters passed from the bootloader to the kernel? (Specify the file name only without any path.)

10. What information can the lspci command display about the system hardware? (Choose THREE correct answers.)

Device IRQ settings

PCI bus speed

System battery type

Device vendor identification

Ethernet MAC address

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11. Which of the following commands brings a system running SysV init into a state in which it is safe to perform maintenance tasks? (Choose TWO correct answers.)

shutdown -R 1 now

shutdown -single now

init 1

telinit 1

runlevel 1

12. What is the first program that is usually started, at boot time, by the Linux kernel when using SysV init?

/lib/init.so

/sbin/init

/etc/rc.d/rcinit

/proc/sys/kernel/init

/boot/init

13. CORRECT TEXT

Which command will display messages from the kernel that were output during the normal boot sequence?

14. Which of the following commands will write a message to the terminals of all logged in users?

bcast

mesg

wall

yell

15. Which of the following kernel parameters instructs the kernel to suppress most boot messages?

silent

verbose=0

nomesg

quiet

16. Which of the following options for the kernel's command line changes the systemd boot target to rescue.target instead of the default target?

systemd.target=rescue.target

systemd.runlevel=rescue.target

systemd.service=rescue.target

systemd.default=rescue.target

systemd.unit=rescue.target

17. Topic 2, Linux Installation and Package Management

After modifying GNU GRUB's configuration file, which command must be run for the changes to take effect?

kill -HUP $(pidof grub)

grub-install

grub

No action is required

18. Which of the following commands is used to update the list of available packages when using dpkg based package management?

apt-get update

apt-get upgrade

apt-cache update

apt-get refresh

apt-cache upgrade

19. Which of the following commands lists the dependencies of a given dpkg package?

apt-cache depends-on package

apt-cache dependencies package

apt-cache depends package

apt-cache requires package

20. Which of the following options is used in a GRUB Legacy configuration file to define the amount of time that the GRUB menu will be shown to the user?

hidemenu

splash

timeout

showmenu

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21. What can the Logical Volume Manager (LVM) be used for? (Choose THREE correct answers.)

To create RAID 9 arrays.

To dynamically change the size of logical volumes.

To encrypt logical volumes.

To create snapshots.

To dynamically create or delete logical volumes.

22. Which of the following commands updates the linker cache of shared libraries?

mkcache

soconfig

mkldconfig

lddconfig

ldconfig

23. Which of the following commands lists all currently installed packages when using RPM package management?

yum --query --all

yum --list --installed

rpm --query --all

rpm --list Cinstalled

24. Which of the following commands can be used to download the RPM package kernel without installing it?

yum download --no-install kernel

yumdownloader kernel

rpm --download --package kernel

rpmdownload kernel

25. When using rpm --verify to check files created during the installation of RPM packages, which of the following information is taken into consideration? (Choose THREE correct answers.)

Timestamps

MD5 checksums

Inodes

File sizes

GnuPG signatures

26. Which of the following is correct when talking about mount points?

Every existing directory can be used as a mount point.

Only empty directories can be used as a mount point.

Directories need to have the SetUID flag set to be used as a mount point.

Files within a directory are deleted when the directory is used as a mount point.

27. Which function key is used to start Safe Mode in Windows NT?

F10

Windows NT does not support Safe Mode

28. Which of the following environment variables overrides or extends the list of directories holding shared libraries?

LD_LOAD_PATH

LD_LIB_PATH

LD_LIBRARY_PATH

LD_SHARE_PATH

LD_RUN_PATH

29. CORRECT TEXT

Which world-writable directory should be placed on a separate partition in order to prevent users from being able to fill up the / filesystem? (Specify the full path to the directory.)

30. Which RPM command will output the name of the package which supplied the file /etc/exports?

rpm -F /etc/exports

rpm -qf /etc/exports

rpm -Kl /etc/exports

rpm -qp /etc/exports

rpm -qi /etc/exports

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31. CORRECT TEXT

In which directory must definition files be placed to add additional repositories to yum?

32. CORRECT TEXT

What is the name of the main configuration file for GNU GRUB? (Specify the file name only without any path.)

33. When removing a package, which of the following dpkg options will completely remove the files including configuration files?

--clean

--delete

--purge

Cremove

34. Which file should be edited to select the network locations from which Debian installation package files are loaded?

/etc/dpkg/dpkg.cfg

/etc/apt/apt.conf

/etc/apt/apt.conf.d

/etc/apt/sources.list

/etc/dpkg/dselect.cfg

35. CORRECT TEXT

Which option to the yum command will update the entire system? (Specify ONLY the option name without any additional parameters.)

36. CORRECT TEXT

Which command will disable swapping on a device? (Specify ONLY the command without any path or parameters.)

37. CORRECT TEXT

Which Debian package management tool asks the configuration questions for a specific already installed package just as if the package were being installed for the first time? (Specify ONLY the command without any path or parameters.)

38. Which of the following commands overwrites the bootloader located on /dev/sda without overwriting the partition table or any data following it?

dd if=/dev/zero of=/dev/sda bs=512

dd if=/dev/zero of=/dev/sda bs=512 count=1

dd if=/dev/zero of=/dev/sda bs=440 count=1

dd if=/dev/zero of=/dev/sda bs=440

39. Topic 3, GNU and Unix Commands

Which of the following commands can be used to create a USB storage media from a disk image?

gdisk

fdisk

mount

40. In Bash, inserting 1>&2 after a command redirects

standard error to standard input.

"Pass Any Exam. Any Time." - www.actualtests.com 19 standard input to standard error.

standard output to standard error.

standard error to standard output.

standard output to standard input.

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41. What command will generate a list of user names from /etc/passwd along with their login shell?

column -s: 1, 7 /etc/passwd

chop -c 1, 7 /etc/passwd

colrm 1, 7 /etc/passwd

cut -d: -f 1, 7 /etc/passwd

42. In a nested directory structure, which find command line option would be used to restrict the command to searching down a particular number of subdirectories?

-dirmax

-maxdepth

-maxlevels

-n

-s

43. Which of the following statements is correct regarding the command foo 1> bar?

The stdout from the command foo is appended to the file bar.

The stdout from the command foo overwrites the file bar.

The command foo receives its stdin from the file bar.

The command foo receives its stdin from the stdout of the command bar.

The stderr from the command foo is saved to the file bar.

44. Which of the following commands kills the process with the PID 123 but allows the process to "clean up" before exiting?

kill -PIPE 123

kill -KILL 123

kill -STOP 123

kill -TERM 123

45. CORRECT TEXT

Which signal is missing from the following command that is commonly used to instruct a daemon to reinitialize itself, including reading configuration files?

killall -s _______ daemon

46. What is the maximum niceness value that a regular user can assign to a process with the nice command when executing a new process?

47. Immediately after deleting 3 lines of text in vi and moving the cursor to a different line, which single character command will insert the deleted content below the current line?

i (lowercase)

P (uppercase)

p (lowercase)

U (uppercase)

u (lowercase)

48. A user accidentally created the subdirectory dir in his home directory.

Which of the following commands will remove that directory?

rmdir '~/dir'

rmdir "~/dir"

rmdir ~/'dir'

rmdir ~/dir

rmdir ~/\dir

49. In compliance with the FHS, in which of the directories are man pages found?

/usr/share/man

/opt/man

/usr/doc/

/var/pkg/man

/var/man

50. Which of the following commands will send output from the program myapp to both standard output (stdout) and the file file1.log?

cat < myapp | cat > file1.log

myapp 0>&1 | cat > file1.log

myapp | cat > file1.log

myapp | tee file1.log

tee myapp file1.log

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51. What is the purpose of the Bash built-in export command?

It allows disks to be mounted remotely.

It runs a command as a process in a subshell.

It makes the command history available to subshells.

It sets up environment variables for applications.

It shares NFS partitions for use by other systems on the network.

52. What is the output of the following command?

echo "Hello World" | tr -d aieou

Hello World

eoo

Hll Wrld

eoo Hll Wrld

53. Which of the following characters can be combined with a separator string in order to read from the current input source until the separator string, which is on a separate line and without any trailing spaces, is reached?

54. Which of the following commands will NOT update the modify timestamp on the file /tmp/myfile.txt?

file /tmp/myfile.txt

echo "Hello" >/tmp/myfile.txt

sed -ie "s/1/2/" /tmp/myfile.txt

echo -n "Hello" >>/tmp/myfile.txt

touch /tmp/myfile.txt

55. What is the default nice level when a process is started using the nice command?

-10

56. What is the default action of the split command on an input file?

It will break the file into new files of 1,024 byte pieces each.

It will break the file into new files of 1,000 line pieces each.

It will break the file into new files of 1,024 kilobyte pieces each.

It will break the file into new files that are no more than 5% of the size of the original file.

57. What is the difference between the i and a commands of the vi editor?

i (interactive) requires the user to explicitly switch between vi modes whereas a (automatic) switches modes automatically.

i (insert) inserts text before the current cursor position whereas a (append) inserts text after the cursor.

i (independent rows) starts every new line at the first character whereas a (aligned rows) keeps the indentation of the previous line.

i (interrupt) temporarily suspends editing of a file to the background whereas a (abort) terminates editing.

58. CORRECT TEXT

Which command displays a list of all background tasks running in the current shell? (Specify ONLY the command without any path or parameters.)

59. Which of the following commands moves and resumes in the background the last stopped shell job?

run

back

60. What is the effect of the egrep command when the -v option is used?

It enables color to highlight matching parts.

It only outputs non-matching lines.

It shows the command's version information.

It changes the output order showing the last matching line first.

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61. What does the? symbol within regular expressions represent?

Match the preceding qualifier one or more times.

Match the preceding qualifier zero or more times.

Match the preceding qualifier zero or one times.

Match a literal character.

62. In the vi editor, how can commands such as moving the cursor or copying lines into the buffer be issued multiple times or applied to multiple rows?

By using the command: repeat followed by the number and the command.

By specifying the number right in front of a command such as 4l or 2yj.

By selecting all affected lines using the shift and cursor keys before applying the command.

By issuing a command such as: set repetition=4 which repeats every subsequent command 4 times.

63. Which of the following files, located in the user home directory, is used to store the Bash history?

.bash_history

.bash_histfile

.history

.bashrc_history

.history_bash

64. CORRECT TEXT

Which Bash environment variable defines in which file the user history is stored when exiting a Bash process? (Specify ONLY the variable name.)

65. Which of the following commands displays the contents of a gzip compressed tar archive?

gzip archive.tgz | tar xvf

tar ztf archive.tgz

gzip -d archive.tgz | tar tvf

tar cf archive.tgz

66. Which grep command will print only the lines that do not end with a / in the file foo?

grep '/$' foo

grep '/#' foo

grep -v '/$' foo

grep -v '/#' foo

67. Which of the following commands is used to change options and positional parameters for a running Bash?

history

set

bashconf

setsh

envsetup

68. Which of the following commands replaces each occurrence of 'bob' in the file letter with 'Bob' and writes the result to the file newletter?

sed '/bob/Bob' letter > newletter

sed s/bob/Bob/ letter < newletter

sed 's/bob/Bob' letter > newletter

sed 's/bob/Bob/g' letter > newletter

sed 's/bob, Bob/' letter > newletter

69. From a Bash shell, which of the following commands directly executes the instruction from the file /usr/local/bin/runme.sh without starting a subshell? (Please select TWO answers.)

source /usr/local/bin/runme.sh

./usr/local/bin/runme.sh

/bin/bash /usr/local/bin/runme.sh

/usr/local/bin/runme.sh

run /usr/local/bin/runme.sh

70. Regarding the command:

nice -5 /usr/bin/prog

Which of the following statements is correct?

/usr/bin/prog is executed with a nice level of -5.

/usr/bin/prog is executed with a nice level of 5.

/usr/bin/prog is executed with a priority of -5.

/usr/bin/prog is executed with a priority of 5.

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71. Which shell command is used to continue background execution of a suspended command?

cont

exec

72. Which of the following shell redirections will write standard output and standard error output to a file named filename?

2>&1 >filename

>filename 2>&1

1>&2>filename

>>filename

1&2>filename

73. In the vi editor, which of the following commands will copy the current line into the vi buffer?

74. Which of the following sequences in the vi editor saves the opened document and exits the editor? (Choose TWO correct answers.)

esc ZZ

ctrl: w!

esc zz

esc: wq!

ctrl XX

75. When starting a program with the nice command without any additional parameters, which nice level is set for the resulting process?

-10

76. Which of the following commands will reduce all consecutive spaces down to a single space?

tr 's' ' ' < a.txt > b.txt

tr -c ' ' < a.txt > b.txt

tr -d ''< a.txt > b.txt

tr -r ' ' '
' < a.txt > b.txt

tr -s ' ' < a.txt > b.txt

77. Which character, added to the end of a command, runs that command in the background as a child process of the current shell?

78. Which of the following commands will print the last 10 lines of a text file to the standard output?

cat -n 10 filename

dump -n 10 filename

head -n 10 filename

tail -n 10 filename

79. Which of the following commands prints a list of usernames (first column) and their primary group (fourth column) from the /etc/passwd file?

fmt -f 1, 4 /etc/passwd

split -c 1, 4 /etc/passwd

cut -d: -f 1, 4 /etc/passwd

paste -f 1, 4 /etc/passwd

80. Which of the following signals is sent to a process when the key combination CTRL+C is pressed on the keyboard?

SIGTERM

SIGINT

SIGSTOP

SIGKILL

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81. What happens after issuing the command vi without any additional parameters?

vi starts and loads the last file used and moves the cursor to the position where vi was when it last exited.

vi starts and requires the user to explicitly either create a new or load an existing file.

vi exits with an error message as it cannot be invoked without a file name to operate on.

vi starts in command mode and opens a new empty file.

vi starts and opens a new file which is filled with the content of the vi buffer if the buffer contains text.

82. Which of the following command sets the Bash variable named TEST with the content FOO?

set TEST="FOO"

TEST = "FOO"

var TEST="FOO"

TEST="FOO"

83. Which variable defines the directories in which a Bash shell searches for executable commands?

BASHEXEC

BASHRC

PATH

EXECPATH

PATHRC

84. Which of the following commands determines the type of a file by using a definition database file which contains information about all common file types?

magic

type

file

pmagic

hash

85. CORRECT TEXT

Which command is used in a Linux environment to create a new directory? (Specify ONLY the command without any path or parameters.)

86. Which of the following commands prints all files and directories within the /tmp directory or its subdirectories which are also owned by the user root? (Choose TWO correct answers.)

find /tmp -uid root -print

find -path /tmp -uid root

find /tmp -user root -print

find /tmp -user root

find -path /tmp -user root Cprint

87. When running the command

sed -e "s/a/b/" /tmp/file >/tmp/file

While /tmp/file contains data, why is /tmp/file empty afterwards?

The file order is incorrect. The destination file must be mentioned before the command to ensure redirection.

The command sed did not match anything in that file therefore the output is empty.

When the shell establishes the redirection it overwrites the target file before the redirected command starts and opens it for reading.

Redirection for shell commands do not work using the > character. It only works using the | character instead.

88. When given the following command line.

echo "foo bar" | tee bar | cat

Which of the following output is created?

cat

foo bar

tee bar

bar

foo

89. Which of the following commands can be used to determine how long the system has been running? (Choose TWO correct answers.)

uptime

top

uname -u

time Cup

90. Which of the following are valid stream redirection operators within Bash? (Choose THREE correct answers.)

<<<

>>>

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91. Topic 4, Devices, Linux Filesystems, Filesystem Hierachy Standard

After successfully creating a hard link called bar to the ordinary file foo, foo is deleted from the file system.

Which of the following describes the resulting situation?

foo and bar would both be removed.

foo would be removed while bar would remain accessible.

foo would be removed. bar would still exist but would be unusable.

Both foo and bar would remain accessible.

The user is prompted whether bar should be removed, too.

92. After moving data to a new filesystem, how can the former path of the data be kept intact in order to avoid reconfiguration of existing applications? (Choose TWO correct answers.)

By creating an ACL redirection from the old to the new path of the data.

By creating a hard link from the old to the new path of the data.

By creating a symbolic link from the old to the new path of the data.

By running the command touch on the old path.

By mounting the new filesystem on the original path of the data.

93. Which of the following commands changes the ownership of file.txt to the user dan and the group staff?

chown dan/staff file.txt

chown dan:staff file.txt

chown -u dan -g staff file.txt

chown dan -g staff file.txt

94. Which of the following commands makes /bin/foo executable by everyone but writable only by its owner?

chmod u=rwx,go=rx /bin/foo

chmod o+rwx,a+rx /bin/foo

chmod 577 /bin/foo

chmod 775 /bin/foo

95. Which of the following commands can be used to search for the executable file foo when it has been placed in a directory not included in $PATH?

apropos

which

find

query

whereis

96. What does the command mount -a do?

It ensures that all file systems listed with the option noauto in /etc/fstab are mounted.

It shows all mounted file systems that have been automatically mounted.

It opens an editor with root privileges and loads /etc/fstab for editing.

It ensures that all file systems listed with the option auto in /etc/fstab are mounted.

It ensures that all file systems listed in /etc/fstab are mounted regardless of their options.

97. Which of the following settings for umask ensures that new files have the default permissions -rwr----- ?

0017

0640

0038

0027

98. Which of the following is the device file name for the second partition on the only SCSI drive?

/dev/hda1

/dev/sda2

/dev/sd0a2

/dev/sd1p2

99. In order to display all currently mounted filesystems, which of the following commands could be used? (Choose TWO correct answers.)

cat /proc/self/mounts

free

mount

lsmounts

cat /proc/filesystems

100. Which of the following commands can be used to locate programs and their corresponding man pages and configuration files?

dirname

which

basename

query

whereis