Data Science And Its Application

40 Questions | Total Attempts: 160

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Data Science And Its Application

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Questions and Answers
  • 1. 
    Point out the correct statement.
    • A. 

      Raw data is original source of data

    • B. 

      Preprocessed data is original source of data

    • C. 

      Raw data is the data obtained after processing steps

    • D. 

      None of the mentioned

  • 2. 
        Data that summarize all observations in a category are called __________ data.
    • A. 

      Frequency

    • B. 

      Summarized

    • C. 

      raw

    • D. 

      None of the mentioned

  • 3. 
       Which of the following is an example of raw data?
    • A. 

      Original swath files generated from a sonar system

    • B. 

      Initial time-series file of temperature values

    • C. 

      A real-time GPS-encoded navigation file

    • D. 

      All of the mentioned

  • 4. 
      Point out the correct statement.
    • A. 

      Primary data is original source of data

    • B. 

      Secondary data is original source of data

    • C. 

      Questions are obtained after data processing steps

    • D. 

      None of the Mentioned

  • 5. 
        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

  • 6. 
       Which of the following is another name for raw data?
    • A. 

      destination data

    • B. 

      eggy data

    • C. 

      secondary

    • D. 

      machine learning

  • 7. 
      Which type of data is generated by POS terminal in a busy supermarket each day?
    • A. 

      Source

    • B. 

      Processed

    • C. 

      Synchronized

    • D. 

      All of the mentioned

  • 8. 
      Point out the correct statement.
    • A. 

      Nearly 80% of data analysis is spent on wrangling data

    • B. 

      Nearly 20% of data analysis is spent on data dredging

    • C. 

      Nearly 80% of data analysis is spent on the cleaning and preparing data

    • D. 

      None of the mentioned

  • 9. 
    Which of the following package is used for tidy data?
    • A. 

      tidyr

    • B. 

      souryr

    • C. 

      NumPy

    • D. 

      None

  • 10. 
        Which of the following process involves structuring datasets to facilitate analysis?
    • A. 

      Data tidying

    • B. 

      Data mining

    • C. 

      Data booting

    • D. 

      none

  • 11. 
       Raw data in the real-world is tidy and properly formatted.
    • A. 

      True

    • B. 

      False

  • 12. 
      Which of the following function is used for loading flat files?
    • A. 

      read.data

    • B. 

      Read.sheet

    • C. 

      read.table

    • D. 

      None of the mentioned

  • 13. 
      Which of the following is an important parameter of read.table function?
    • A. 

      file

    • B. 

      Header

    • C. 

      Sep

    • D. 

      all of the mentioned

  • 14. 
    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

  • 15. 
        Which of the following package is used for reading excel data?
    • A. 

      Xlsx

    • B. 

      xlsc

    • C. 

      Read.sheet

    • D. 

      all of the mentioned

  • 16. 
       Which of the following can be used to view all the tables in memory?
    • A. 

      Tables

    • B. 

      alltable

    • C. 

      Table

    • D. 

      None

  • 17. 
    Which of the following is used to extract data from HTML code of websites?
    • A. 

      Webscraping

    • B. 

      Webdredging

    • C. 

      Webcleaning

    • D. 

      All of the mentioned

  • 18. 
    Which of the following function is used to read data off the webpages?
    • A. 

      read.web

    • B. 

      Read.Lines

    • C. 

      read.Line

    • D. 

      all of the mentioned

  • 19. 
    Which of the following function gives information about top level data?
    • A. 

      Head

    • B. 

      tail

    • C. 

      Summary

    • D. 

      None of the mention

  • 20. 
        Point out the correct statement.
    • A. 

      head function work on string

    • B. 

      tail function work on string

    • C. 

      Head function work on string but tail function do not

    • D. 

      none of the mentioned

  • 21. 
    Which of the following function is used for quantiles of quantitative values?
    • A. 

      quantile

    • B. 

      quantity

    • C. 

      quantiles

    • D. 

      all of the mentioned

  • 22. 
      Which of the following function is used for quantiles of quantitative values?
    • A. 

      Quantile

    • B. 

      Quantity

    • C. 

      Quantiles

    • D. 

      All of the mentioned

  • 23. 
    Which of the following function is used for casting data frames?
    • A. 

      Dcast

    • B. 

      Ucast

    • C. 

      Rcast

    • D. 

      all of the mentioned

  • 24. 
        mutate function is used for casting as multi dimensional arrays.
    • A. 

      True

    • B. 

      False

  • 25. 
      How do you check if “m” is a matrix data object in R?
    • A. 

      As.matrix()

    • B. 

      M.matrix()

    • C. 

        And.matrix()

    • D. 

      None

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