Linux Quiz and Practice Problems for 2023

Welcome to your Linux Quiz

Which of the following acts as the mediator between the kernel and end user in Unix Operating System?

Kernel

Shell

Hardware

None of the above

Which of the following interacts directly with the hardware in Unix Operating System?

Shell

Kernel

User

All of the above

Which command is used to execute a command as some other user or super-user?

which

apt-get

sudo

None of the above

Which of the following command is used to erase the command-line history?

history

clear

history -c

clear -a

Which of the following command will you be using to check out the directory that you are currently working on?

cd

pwd

cwd

Both 2 and 3

What are the 3 different Access control on UNIX systems? (Choose all the correct answers)

User

Group

Administrator

Other

Why do you use the Chown command in UNIX?

To modify file permissions

To call a text editor

Modify the Permission of Processes

Modify a file's owner

What is the meaning of 777 in UNIX permissions?

Give no permissions to Users, Groups and Others

Provide all permissions to Users, Groups and Others

Provide only read for User, Group and Others

Provide only execute for User, Group and Others

Are we the owner of a file when we create it?

Yes, we are!

No, we are not!

Which is the default permission set for directories?

rwxrwxrwx

--x--x--x

r-xr-xr-x

rw-rw-rwx

Which command is used to start the cat process in the background?

cat &&

cat &

Both 1 and 2

None of the above

Which command lists out all the running processes for one user?

ps -u [username]

ls -u [username]

Which of the following has lowest priority?

Nice value = 4

Nice value = -4

Nice value = 2

Nice value = -2

Which of the following command is used to check the amount of disk space used by a file system?

ps

ls

df

None of the above

Which of the following terminate signal kills the process when used with the kill command?

1

5

9

14

Which of the following is the correct way of setting an environment variable?

export [local_variable_name]

export set [local_variable_name]

None of the above

Which of the following is not a proper shell name?

Csh : C shell

Ksh : Korn Shell

Bash : bourne again shell

Ssh : sea shell

Shell programs are

Compiled

Command processed

Interpreted

None of the above

In Shell scripting, what is $*

Its mainly used for showing up all params. This will show few parameter values passed in shell script

Its mainly used for showing up all params. This will show all parameters values passed in shell script

Both 1 and 2

How do you find out what's your shell?

pwd

echo $SHELL

$sh

whoami

What is the most basic conditional statement?

why

for

if

while

Which statement is used to stop the current iteration and start a new iteration?

Break

Close

Do

Continue

Why use Case … esac statement?

Best looping statement

Execute statements under a chosen pattern

Execute statements when the loop iterates 5 times

Create a case file and close a case file

For loop needs a list for iteration in Linux. True or False.

True

False

What is NOT a benefit of functions?

Reuse the code

Improves code’s readability

Makes the code complex

Code is in sub-steps

Which is the right way of making variable “a” ask for the first parameter which is entered with the function?

a==$1

a=$1

a=#1

a==#1

How to call a function in one file from another file?

First use the source command to add the file and then enter the function names

Directly enter the function names

Enter function names with brackets “()”

First use the source command to add the file and then use function names with brackets “()”

Which of the following command will print out the numbers of fields in a record from the data.csv file?

awk '{print NR,$0}' data.csv

awk '{print NF,$0}' data.csv

awk '{print NR}' data.csv

awk '{print NF}' data.csv

Which of the following statement is true about SORT commands?

First numbers, then lower case letters, and then upper case letters

First Upper case letters, then lower case letters, and then numbers

First lower case letters, then upper case letters, and then numbers

First numbers, then upper case letters, and then lower case letters

Which of the following flag is used with SED commands to make in-line changes?

-f

-i

-w

Both 2 and 3

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