Data Collection and Preprocessing MCQ Questions and Answers

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Each section contains 100 MCQs on Data Collection and Preprocessing .

Which of the following function is used for casting data frames?

A) dcast B) ucast C) rcast D) all of the mentioned

Discuss

Answer & Solution

Answer: Option A

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

Extracting XML is the basis for most web scraping.

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 join is by default used in plyr package?

A) left B) right C) full D) all of the mentioned

Discuss

Answer & Solution

Answer: Option A

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

Which of the following package is used for reading JSON data?

A) jsonlite B) json C) jsondata D) all of the mentioned

Discuss

Answer & Solution

Answer: Option A

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

Which of the following is another name for raw data?

A) destination data B) eggy data C) secondary D) machine learning

Discuss

Answer & Solution

Answer: Option B

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

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

A) % B) @ C) . D) All 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 function is used for determining missing values?

A) any B) all C) is 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 is a trait of tidy data?

A) each variable in one column B) each observation in different row C) one table for each kind of variable D) none of the mentioned

Discuss

Answer & Solution

Answer: Option B

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

Point out the wrong statement.

A) Common variables are used to create missingness vector B) Common variables are used to cutting up quantitative variables C) Common variables are not used to apply transforms D) All of the mentioned

Discuss

Answer & Solution

Answer: Option C

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

100

Which of the following transforms can be performed with data value?

A) log2 B) cos C) log10 D) all of the mentioned

Discuss

Answer & Solution

Answer: Option D

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