Module 7 Live Virtual Machine Labs 1-8

Question 1

You need to make the shell script executable. Which of the parameter along with the chmod command should you use?

+x
-x
+rwx
-rwx

Answer 1

+x

Question 2

lab 7-1

The _______ statements are mainly used for making a decision and therefore, are known as decision-making statements.

until loop
for loop
while loop
if…else
case…esac

Answer 2

if…else

Question 3

In a scenario, where you have multiple conditions, it is best to use ________ statements.

if…else
for loop
until loop
while loop
case…esac

Answer 3

case esac

Question 4

Which two loops run until a statement becomes true? [Choose two.]

for loop
while loop
case…esac
until loop
if…else

Answer 4

while loop
until loop

Question 5

The ______ loop runs through a list of values in a list until the time list values are exhausted.

for loop
if…else
until loop
while loop
case…esac

Answer 5

for loop

Question 6

lab 7-2

Which variables are contained in /etc/profile? [Choose all that apply.]

USER
PATH
MAIL
HOSTNAME
HISTSIZE

Answer 6

USER
PATH
MAIL
HOSTNAME
HISTSIZE

Question 7

The ____ profile is the user configuration file in which the user environment can be configured.

~/.bash_profile
~/.bash_login
/etc/profile
/etc/bashrc

Answer 7

~/.bash_profile

Question 8

If the ~/.bash_profile does not exist, then the __________ file is read.

~/.profile
/etc/bashrc
/etc/profile
~/.bash_login

Answer 8

~/.bash_login

Question 9

The _________ gets executed only during a login shell.

~/.bash_profile
~/.bash_login
/etc/profile
/etc/bashrc

Answer 9

~/.bash_profile

Question 10

Which value with the chmod command will make a shell script executable?

100
400
700
444

Answer 10

700

Question 11

lab 7-3

The default output of a command is displayed on the _______. [Choose all that apply.]

File
Keyboard
Screen
Console

Answer 11

console
screen

Question 12

The output of a command is redirected to a new file with the help of the _____ operator.

> > <
«

Answer 12

>

Question 13

Which operator will overwrite the contents of an existing file?

> &laquo_space;
>
<

Answer 13

>

Question 14

Which operator will append the output to the same file without overwriting it?

> > <
«

Answer 14

> >

Question 15

lab 7-4

To send the content of one file to another file, you can use the _______ redirector.

&laquo_space;
>
»
<

Answer 15

>

Question 16

The ________ command is another filter that is used to print the selected output of a file onto the screen.

cp
ls -l
ls
cut

Answer 16

cut

Question 17

lab 7-5

Which of the following standard input value is used for the default keyboard?

1
3
2
0
4

Answer 17

0

Question 17

The _______ command is another filter that converts tabs to spaces, without affection the source file. By default, a tab consists of eight spaces.

expand
ls -l
cp
cut
ls

Answer 17

expand

Question 18

You can use ________ to convert the spaces back to default tabs in a file.

unexpand
cp
cut
expand
ls -l

Answer 18

unexpand

Question 19

The _______ command is used to define the uniform spacing between words and sentences.

expand
cp
cut
fmt
unexpand
ls -l

Answer 19

fmt

Question 20

Which two standard output values are used for the default terminal? [Choose two.]

3
4
0
1
2

Answer 20

1
2

Question 21

To append the information to an existing file, which type of redirector should be used>

> > «<

Answer 21

> >

Question 22

Which of the following is used for combining two outputs?

|
#
&
>

Answer 22

&

Question 23

Which operator is typically used with the xargs command?

&
>
#
|

Answer 23

|

Question 24

lab 7-6 Which command prints partial or full environment variables? env print printenv set

Answer 24

printenv

Question 25

Which command prints the name and value of each shell variable available? printenv print set env

Answer 25

set

Question 26

Which command prints the all exported environment variables? print printenv set env

Answer 26

env

Question 27

lab 7-7 Which of the following is the global profile used for all the users in a Linux system? /etc/profile /etc/bash /etc/users /etc/hosts

Answer 27

/etc/profile

Question 28

Which of the following is activated when the user logs on and also loads the environment variables? /var/passwd ~/bashrc /etc/hosts .profile

Answer 28

.profile

Question 29

Which of the following file is executed when a login shell exits? .profile .bash_logout /etc/hosts ~/bashrc

Answer 29

.bash_logout

Question 30

Which command will list the environment variables? top env nice renice ps

Answer 30

env

Question 31

Which command enables you to export variables to be used by other processes? export env renice nice top ps

Answer 31

export

Question 32

lab 7-8 What is the extension of a shell script? .exe .txt .ps .sh

Answer 32

.sh

Question 33

Which are two methods to execute a shell script named plab.sh? [Choose two.] ./plab.sh bash plab.sh .plab.sh plab.sh

Answer 33

bash plab.sh ./plab.sh

Question 34

Which command should you enter to save and exit a file that is opened in the vi editor? :wq :sq :ws :aq

Answer 34

:wq

Question 35

Which of the following executes a list of commands repeatedly till the specified condition is reached? while do for if

Answer 35

while

Question 36

You can use the ______ loop to check for a condition and perform a task. for while do if

Answer 36

if