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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 7 of 18

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Q61.
To select lines containing gupta and agarwal, which command will be used?

a.

sed -n ‘/gupta/,/agarwal/p’ emp.lst

b.

sed -n ‘/gupta/agarwal/p’ emp.lst

c.

sed ‘/gupta | agarwal’p’ emp.lst

d.

sed -n

Discuss
Answer: (a).sed -n ‘/gupta/,/agarwal/p’ emp.lst
Q62.
To write selected lines, ____ is used with sed.

a.

i

b.

n

c.

w

d.

p

Discuss
Answer: (c).w
Q63.
Which built-in variable is used by the awk to specify the line numbers?

a.

AR

b.

NR

c.

$$

d.

$?

Discuss
Answer: (b).NR
Q64.
What is the default delimiter used by awk?

a.

tab

b.

whitespace

c.

double space

d.

|

Discuss
Answer: (b).whitespace
Q65.
The printf function uses ___ for string data and ___ for numeric.

a.

%f, %l

b.

%s, %f

c.

%s, %d

d.

%s, %s

Discuss
Answer: (c).%s, %d
Q66.
awk doesn’t use $ in evaluation or assignment of variables.

a.

True

b.

False

c.

may be

d.

Can't say

Discuss
Answer: (a).True
Q67.
A user-defined variable is initialized to ____

a.

zero

b.

zero or null string

c.

null

d.

operator

Discuss
Answer: (b).zero or null string
Q68.
awk uses ___ operator for concatenating strings.

a.

>

b.

|

c.

*

d.

no operator available

Discuss
Answer: (d).no operator available
Q69.
awk uses __ and __ as comparison operators.

a.

$$, ^^

b.

||, &&

c.

%%, ##

d.

||, @@

Discuss
Answer: (b).||, &&
Q70.
awk allows the user to use variables of his own choice.

a.

True

b.

False

c.

May be

d.

Can't say

Discuss
Answer: (a).True
Page 7 of 18

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