Test Your Intermediate Data Skills
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Questions and Answers

What is the purpose of data cleaning?

  • To create duplicate data within a dataset
  • To visualize data through common graphics
  • To add more data to a dataset
  • To fix incorrect or incomplete data within a dataset (correct)
  • What is data visualization?

  • The process of removing incomplete data within a dataset
  • The representation of data through use of common graphics (correct)
  • The process of adding more data to a dataset
  • The process of fixing incorrect data within a dataset
  • What is the difference between data preprocessing and data cleaning?

  • Data preprocessing involves removing data while data cleaning involves adding data
  • Data preprocessing involves transforming data while data cleaning involves fixing data (correct)
  • Data preprocessing involves visualizing data while data cleaning involves organizing data
  • There is no difference, they are the same thing
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