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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 6 of 18

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Q51.
Character class is used for matching a group of characters enclosed within a pair of _____

a.

( )

b.

“ “

c.

[ ]

d.

{ }

Discuss
Answer: (c).[ ]
Q52.
The following command will match ‘Agarwal’, ‘agarwal’ and ‘agrawal’.

$ grep “[aA]g[ar][ar]wal” emp.lst

a.

True

b.

False

c.

May be

d.

Can't say

Discuss
Answer: (a).True
Q53.
Which of the following symbol is used for matching the immediate preceding character?

a.

*

b.

$

c.

[ ]

d.

%

Discuss
Answer: (a).*
Q54.
Which symbol is used for matching a single character?

a.

*

b.

.

c.

&

d.

%

Discuss
Answer: (b)..
Q55.
Which of the following symbols are used for matching a pattern at specified locations?

a.

*

b.

^

c.

$

d.

^ and $

Discuss
Answer: (d).^ and $
Q56.
The following command will match the lines beginning with ‘2’.

$ grep “^2” emp.lst

a.

True

b.

False

c.

May be

d.

Can't say

Discuss
Answer: (a).True
Q57.
Which of the following symbols are a set of ERE (extended regular expressions) ?

a.

+

b.

–

c.

?

d.

+ and –

Discuss
Answer: (d).+ and –
Q58.
Which option is used when we want to use an ERE with grep command?

a.

-e

b.

-i

c.

-E

d.

-i

Discuss
Answer: (c).-E
Q59.
Which of the following symbols are used for matching multiple patterns?

a.

|

b.

&

c.

( and )

d.

| and ( and )

Discuss
Answer: (c).( and )
Q60.
To perform context addressing, we have to enclose the pattern in ____

a.

double quotes

b.

single quotes

c.

/ /

d.

$ $

Discuss
Answer: (c)./ /
Page 6 of 18

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