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Welcome to the Filters and Regular Expressions MCQs Page

Dive deep into the fascinating world of Filters and Regular Expressions with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Filters and Regular Expressions, a crucial aspect of UNIX. In this section, you will encounter a diverse range of MCQs that cover various aspects of Filters and Regular Expressions, 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 UNIX.

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Check out the MCQs below to embark on an enriching journey through Filters and Regular Expressions. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of UNIX.

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

Filters and Regular Expressions MCQs | Page 15 of 18

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Q141.
The interval regular expression uses the character _______

a.

{

b.

}

c.

{ and }

d.

( and )

Discuss
Answer: (c).{ and }
Q142.
Which one of the following command will be used for adding two spaces before every line in emp.lst?

a.

sed ‘s/^/ /’ emp.lst

b.

sed ‘s / / /’emp.lst

c.

sed ‘s /$/ /’emp.lst

d.

sed ‘s/$/

Discuss
Answer: (a).sed ‘s/^/ /’ emp.lst
Q143.
Which shortcut does sed offer to replace the string Linux with Red hat Linux?

a.

{ }

b.

( )

c.

^^

d.

&

Discuss
Answer: (d).&
Q144.
Which command will be used for selecting lines 3 to 10 from emp.lst?

a.

sed 3,10 emp.lst

b.

sed -n ‘3,10p’ emp.lst

c.

sed -n ‘^,10p’ emp.lst

d.

sed -n, 10p

Discuss
Answer: (b).sed -n ‘3,10p’ emp.lst
Q145.
Which filter apart from perl, is the most powerful?

a.

sed

b.

awk

c.

grep

d.

cut

Discuss
Answer: (b).awk
Q146.
Awk filter operates at field level.

a.

True

b.

False

c.

May be

d.

Can't say

Discuss
Answer: (a).True
Q147.
Which of the following will be used to print lines containing ‘manager’ in emp.lst?

a.

awk ‘/manager/ { print }’ emp.lst

b.

awk ‘/manager { print }’ emp.lst

c.

awk ‘/manager/ { print } emp.lst

d.

awk ‘manager { print }’ emp.lst

Discuss
Answer: (a).awk ‘/manager/ { print }’ emp.lst
Q148.
The default action if selection_criteria is missing is ____

a.

print

b.

split

c.

print and split

d.

no default action

Discuss
Answer: (a).print
Q149.
For pattern-matching, awk uses regular expressions in ____ style.

a.

sed

b.

grep

c.

perl

d.

print

Discuss
Answer: (a).sed
Q150.
awk uses ______ for splitting a line into fields.

a.

special parameters

b.

shell variables

c.

env variables

d.

command arguments

Discuss
Answer: (a).special parameters
Page 15 of 18

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