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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 4 of 18

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Q31.
To check whether the file has actually been stored in the default order, we can use ____ option.

a.

-n

b.

-a

c.

-d

d.

-c

Discuss
Answer: (d).-c
Q32.
Which option is used with sort command to sort multiple files collectively?

a.

-m

b.

-n

c.

-c

d.

-o

Discuss
Answer: (a).-m
Q33.
Which option is used for selecting repeated entries?

a.

-d

b.

-c

c.

-u

d.

-a

Discuss
Answer: (a).-d
Q34.
______ option is used for counting frequency of occurrence.

a.

-d

b.

-c

c.

-u

d.

-a

Discuss
Answer: (b).-c
Q35.
The output of the following command will be:

$ uniq foo1 foo2

a.

erroneous

b.

output stored in foo2

c.

concatenates both files

d.

process foo1 and output is stored in foo2

Discuss
Answer: (d).process foo1 and output is stored in foo2
Q36.
Which command is used for translating characters?

a.

sort

b.

trans

c.

tr

d.

paste

Discuss
Answer: (c).tr
Q37.
To replace | with ~, which one of the following commands will be used?

a.

tr ‘|\’ ‘~-‘

b.

tr ‘|\’ ‘~-‘ > emp.lst

c.

tr | ~ emp.lst

d.

!

Discuss
Answer: (b).tr ‘|\’ ‘~-‘ > emp.lst
Q38.
head -n 3 emp.lst | tr ‘[a-z]’ ‘[A-Z]’

Above command will change the case of text from lower to upper.

a.

True

b.

False

c.

May be

d.

Can't say

Discuss
Answer: (a).True
Q39.
Which option is used with tr command for deleting characters?

a.

-d

b.

-c

c.

-n

d.

-a

Discuss
Answer: (a).-d
Q40.
______ option is used for compressing multiple consecutive characters.

a.

-d

b.

-c

c.

-n

d.

-s

Discuss
Answer: (d).-s
Page 4 of 18

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