Explore topic-wise MCQs in Data Science.

This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Data Science knowledge and support exam preparation. Choose a topic below to get started.

1.

merge function is used for merging data frames.

A. True
B. False
Answer» B. False
Discussion
2.

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
Answer» C. gepexpr
Discussion
3.

Regular expressions can be thought of as a combination of literals and metacharacters.

A. True
B. False
Answer» B. False
Discussion
4.

Which of the following metacharacter is used to refer to any character?

A. %
B. @
C. .
D. All of the mentioned
Answer» D. All of the mentioned
Discussion
5.

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

A. split
B. strsplit
C. autsplit
D. none of the mentioned
Answer» C. autsplit
Discussion
6.

MERGE_FUNCTION_IS_USED_FOR_MERGING_DATA_FRAMES.?$
A. True
B. False
Answer» B. False
Discussion
7.

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
Answer» C. gepexpr
Discussion
8.

Which of the following signs are used to indicate repetition?

A.
B. *
C. –
Answer» C. ‚Äö√Ñ√∂‚àö√ë‚àö¬®
Discussion
9.

Regular expressions can be thought of as combination of literals and metacharacters.

A. True
B. False
Answer» B. False
Discussion
10.

Which of the following is used for specifying character class with metacharacter?

A. [].
B. {}
C. /+
D. All of the Mentioned
Answer» B. {}
Discussion
11.

Which of the following metacharacter is used to refer to any character?
A. %
B. @
C. .
D. All of the Mentioned
Answer» D. All of the Mentioned
Discussion
12.

Which of the following function is used for fixing character vectors?

A. tolower
B. toUPPER
C. toLOWER
D. all of the Mentioned
Answer» B. toUPPER
Discussion
13.

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

A. split
B. strsplit
C. autsplit
D. none of the Mentioned
Answer» C. autsplit
Discussion