Data Science MCQs with answers Page - 13

Here, you will find a collection of MCQ questions on Data Science. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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Q. Point out the correct statement.

  • (A) Nearly 80% of data analysis is spent on wrangling data
  • (B) tail
  • (C) Nearly 80% of data analysis is spent on the cleaning and preparing data
  • (D) None of the mentioned

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Q. Which of the following function gives information about top level data?

  • (A) head
  • (B) header
  • (C) summary
  • (D) none of the mentioned

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Q. Which of the following is an important parameter of read.table function?

  • (A) file
  • (B) summarized
  • (C) sep
  • (D) all of the mentioned

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Q. Data that summarize all observations in a category are called . . . . . . . . data.

  • (A) frequency
  • (B) Secondary data is original source of data
  • (C) raw
  • (D) none of the mentioned

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Q. Point out the correct statement.

  • (A) Primary data is original source of data
  • (B) initial time-series file of temperature values
  • (C) Questions are obtained after data processing steps
  • (D) None of the Mentioned

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Q. Which of the following is an example of raw data?

  • (A) original swath files generated from a sonar system
  • (B) rgeos
  • (C) a real-time GPS-encoded navigation file
  • (D) all of the mentioned

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Q. Which of the following package is used for reading GIS data?

  • (A) rdgal
  • (B) xlsc
  • (C) raster
  • (D) all of the mentioned

A

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Q. Which of the following can be used to view all the tables in memory?

  • (A) tables
  • (B) alltable
  • (C) table
  • (D) none of the mentioned

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Q. Point out the wrong statement.

  • (A) data.table inherits from data.frame
  • (B) data.table is written in Java
  • (C) data.table is faster at subsetting and updating data
  • (D) none of the mentioned

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Q. 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

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