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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 9 of 18

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Q81.
Which of the following is an associative array?

a.

a[ ]

b.

arr[ ]

c.

envr [ ]

d.

ENVIRON[ ]

Discuss
Answer: (d).ENVIRON[ ]
Q82.
Which function is used by perl for displaying the length of a string?

a.

string

b.

len

c.

split

d.

length

Discuss
Answer: (d).length
Q83.
___ function returns the first occurrence of a character in a string.

a.

string

b.

index

c.

split

d.

length

Discuss
Answer: (b).index
Q84.
For extracting a substring, ____ function is used.

a.

string

b.

index

c.

substr

d.

length

Discuss
Answer: (c).substr
Q85.
substr function is also used to alter an existing string.

a.

True

b.

True

c.

May be

d.

Can't say

Discuss
Answer: (b).True
Q86.
Which function is used by perl for reversing a string?

a.

rev

b.

reverse

c.

split

d.

View Answer

View Answer

substr

Discuss
Answer: (b).reverse
Q87.
Which function is used for handling substitutions in perl?

a.

tr

b.

s

c.

str

d.

tr and s

Discuss
Answer: (d).tr and s
Q88.
Which escape character is used for identifying a word character?

a.

\s

b.

\d

c.

\w

d.

\n

Discuss
Answer: (c).\w
Q89.
We can use find command for testing files with perl.

a.

True

b.

False

c.

may be

d.

Can't say

Discuss
Answer: (a).True
Q90.
Which of the following is referred to as default variable?

a.

$0

b.

$1

c.

$!

d.

$_

Discuss
Answer: (d).$_
Page 9 of 18

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