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Welcome to the Data Manipulation MCQs Page

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

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Check out the MCQs below to embark on an enriching journey through Data Manipulation. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Data Science.

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

Data Manipulation MCQs | Page 6 of 6

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Q51.
Which of the following function is good for the automatic splitting of names?

a.

split

b.

strsplit

c.

autsplit

d.

none of the mentioned

Discuss
Answer: (b).strsplit
Q52.
Point out the correct statement.

a.

gsub is used for fixing character vectors

b.

sub is used for finding values like grep

c.

grep is used for fixing character vectors

d.

none of the mentioned

Discuss
Answer: (a).gsub is used for fixing character vectors
Q53.
Which of the following function is used for fixing character vectors?

a.

tolower

b.

toUPPER

c.

toLOWER

d.

all of the mentioned

Discuss
Answer: (a).tolower
Q54.
Which of the following metacharacter is used to refer to any character?

a.

%

b.

@

c.

.

d.

All of the mentioned

Discuss
Answer: (c)..
Q55.
Point out the wrong statement.

a.

Variables with character values should be made less descriptive

b.

Variables with character values should usually be made into factor variable

c.

Common variables are used to apply transforms

d.

All of the mentioned

Discuss
Answer: (a).Variables with character values should be made less descriptive
Q56.
Which of the following is used for specifying character class with metacharacter?

a.

[]

b.

{}

c.

/+

d.

All of the mentioned

Discuss
Answer: (a).[]
Q57.
Regular expressions can be thought of as a combination of literals and metacharacters.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q58.
Which of the following signs are used to indicate repetition?

a.

#

b.

*

c.

–

d.

All of the mentioned

Discuss
Answer: (b).*
Q59.
Which of the following function is used for searching text strings by means of regular expression?

a.

grepd

b.

grepl

c.

gepexpr

d.

all of the mentioned

Discuss
Answer: (b).grepl
Q60.
merge function is used for merging data frames.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Page 6 of 6

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