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Machine Learning basics MCQ Quiz (Multiple Choice Questions And Answers)

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16. Which of the following is a disadvantage of decision trees?

  •  Factor analysis
  •  Decision trees are robust to outliers
  • Decision trees are prone to be overfit
  • None of the above

17.  Which of the following is a reasonable way to select the number of principal components "k"?

  • Choose k to be the smallest value so that at least 99% of the varinace is retained
  • Choose k to be 99% of m (k = 0.99*m, rounded to the nearest integer).
  • Choose k to be the largest value so that 99% of the variance is retained.
  • Use the elbow method.

18. High entropy means that the partitions in classification are

  • pure
  • not pure
  • useful
  • useless

19.  What is a sentence parser typically used for?

  •  It is used to parse sentences to check if they are utf-8 compliant.
  • It is used to parse sentences to derive their most likely syntax tree structures.
  • It is used to parse sentences to assign POS tags to all tokens.
  • It is used to check if sentences can be parsed into meaningful tokens.

20. Which of the following techniques can not be used for normalization in text mining?

  • Stemming
  • Lemmatization
  • Stop Word Removal
  • None of the above