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Welcome to the Unix System MCQs Page

Dive deep into the fascinating world of Unix System with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Unix System, a crucial aspect of Operating System. In this section, you will encounter a diverse range of MCQs that cover various aspects of Unix System, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Operating System.

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Check out the MCQs below to embark on an enriching journey through Unix System. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Operating System.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Unix System. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Unix System MCQs | Page 3 of 17

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Q21.
The agency that sits between the user and the UNIX system is called the

a.

logic

b.

profile

c.

shell

d.

erxc

Discuss
Answer: (c).shell
Q22.
Which of the following commands is used to update access and modification times of a file?

a.

grep

b.

wc

c.

touch

d.

cat

Discuss
Answer: (c).touch
Q23.
Which command is used to count just the number of characters in a file?

a.

wc - 1

b.

wc -c

c.

wc -w

d.

wc -r

Discuss
Answer: (b).wc -c
Q24.
Which of the following commands is used to list contents of directories?

a.

ls

b.

lp

c.

dir

d.

tar

Discuss
Answer: (a).ls
Q25.
Which command is used to display a file contents in octal form?

a.

cd

b.

od

c.

of

d.

oct

Discuss
Answer: (b).od
Q26.
Which command will be used with vi editor to insert text to left of cursor?

a.

s

b.

S

c.

a

d.

i

Discuss
Answer: (d).i
Q27.
In vi editor, forward search is performed using the command.

a.

:pat

b.

?pat

c.

/pat

d.

All of the above

Discuss
Answer: (c)./pat
Q28.
Which of the following special shell variables is used to process number of the last background job?

a.

$!

b.

$#

c.

$0

d.

$*

Discuss
Answer: (a).$!
Q29.
Which option will be used with ps command to slow the entire command line of the process being run?

a.

-4

b.

-f

c.

-1

d.

-2

Discuss
Answer: (b).-f
Q30.
Which of the following command addresses all users who are currently hooked on?

a.

write

b.

mail

c.

wall

d.

mesg

Discuss
Answer: (c).wall
Page 3 of 17

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