Data Collection and Preprocessing MCQ Questions and Answers

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Each section contains 100 MCQs on Data Collection and Preprocessing .

Point out the correct statement.

A) XLConnect package has more options for manipulating access files B) XLConnect vignette package can also be used for manipulating excel files C) write.xlsx write out an excel file with different argument D) None of the mentioned

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

Which of the following block information is odd man out?

A) Subsetting B) Raw data C) Ready for analysis D) None of the mentioned

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

httr package does not work well with facebook and twitter API.

A) True B) False

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

Which of the following data is put into a formula to produce commonly accepted results?

A) Raw B) Processed C) Synchronized D) All of the Mentioned

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

mutate function is used for casting as multi dimensional arrays.

A) True B) False

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

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

A) [] B) {} C) /+ D) All of the mentioned

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

Point out the wrong statement.

A) Tidy datasets are all alike but every messy dataset is messy in its own way B) Most statistical datasets are data frames made up of rows and columns C) Tidy datasets provide a standardized way to link the structure of a dataset with its semantics D) None of the mentioned

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

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

A) True B) False

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

Which of the following is an example of tidy data?

A) complicated JSON from facebook API B) complicated JSON from Twitter API C) unformatted excel file D) all of the mentioned

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

Which of the following will set the character that represents missing value?

A) na.quote B) na.strings C) nrows D) all of the mentioned

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

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Data Collection and Preprocessing MCQ Questions and Answers | Data Science MCQs