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101-400 Questions and Answers

Question # 6

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

A.

.bash_history

B.

.bash_histfile

C.

.history

D.

.bashrc_history

E.

.history_bash

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Question # 7

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

A.

run

B.

bg

C.

fg

D.

back

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Question # 8

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

A.

LD_LOAD_PATH

B.

LD_LIB_PATH

C.

LD_LIBRARY_PATH

D.

LD_SHARE_PATH

E.

LD_RUN_PATH

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Question # 9

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

A.

mkcache

B.

soconfig

C.

mkldconfig

D.

lddconfig

E.

ldconfig

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Question # 10

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

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Question # 11

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

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Question # 12

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

A.

--clean

B.

--delete

C.

--purge

D.

–remove

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Question # 13

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

A.

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

B.

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

C.

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

D.

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

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Question # 14

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

A.

kill -HUP $(pidof grub)

B.

grub-install

C.

grub

D.

No action is required

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Question # 15

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

A.

systemd.target=rescue.target

B.

systemd.runlevel=rescue.target

C.

systemd.service=rescue.target

D.

systemd.default=rescue.target

E.

systemd.unit=rescue.target

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Question # 16

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

A.

silent

B.

verbose=0

C.

nomesg

D.

quiet

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Question # 17

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

A.

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

B.

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

C.

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

D.

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

E.

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

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Question # 18

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

A.

0

B.

1

C.

3

D.

5

E.

6

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Question # 19

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

A.

The bootloader

B.

The inetd program

C.

The init program

D.

The kernel

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Question # 20

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

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Question # 21

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

A.

shutdown -r now

B.

shutdown -r "rebooting"

C.

telinit 6

D.

telinit 0

E.

shutdown -k now "rebooting"

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Question # 22

What does the command mount -a do?

A.

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

B.

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

C.

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

D.

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

E.

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

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Question # 23

What is the process ID number of the init process on a SysV init based system?

A.

-1

B.

0

C.

1

D.

It is different with each reboot.

E.

It is set to the current run level.

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Question # 24

In the vi editor, what vi command will copy (but not paste) from the current line at the cursor and the following 16 lines (17 lines total)? Specify the correct vi command without spaces.

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Question # 25

Which of the following options must be passed to a filesystem’s entry in /etc/fstab in order to mount the file system without root privileges?

A.

auto

B.

norestrict

C.

noauto

D.

user

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Question # 26

Where does the BIOS search for a bootloader?

A.

On all connected storage media regardless of the boot device order.

B.

On all connected storage media in the defined boot device order.

C.

Only on hard disk drives in the defined boot device order.

D.

Only on the last added storage media.

E.

The BIOS is not responsible to search for a valid bootloader.

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