Pandas MCQs with answers Page - 5

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Q. Which method converts a DataFrame to a NumPy array?

  • (A) df.to_numpy()
  • (B) df.to_array()
  • (C) df.as_matrix()
  • (D) df.values()

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Q. What will `df['col'].nlargest(3)` return?

  • (A) Smallest 3 values
  • (B) 3 random values
  • (C) 3 largest values
  • (D) First 3 rows

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Q. Which method combines DataFrames by aligning on index?

  • (A) merge()
  • (B) concat()
  • (C) join()
  • (D) combine()

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Q. Which of the following returns the median value of a Series?

  • (A) mean()
  • (B) sum()
  • (C) mode()
  • (D) median()

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Q. Which function is used to save a DataFrame to a CSV file?

  • (A) df.write_csv()
  • (B) df.export_csv()
  • (C) df.to_csv()
  • (D) df.save_csv()

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Q. What does `df.loc[0]` return?

  • (A) First column
  • (B) Row with label 0
  • (C) Third row
  • (D) Column with label 0

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Q. Which of the following will create a date range of 7 days starting from 2022-01-01?

  • (A) pd.date_range('2022-01-01', periods=7)
  • (B) pd.date_range(start='2022-01-01', end='2022-01-07')
  • (C) Both a and b
  • (D) None of the above

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Q. What is the output type of `df['col'].value_counts()`?

  • (A) DataFrame
  • (B) Series
  • (C) List
  • (D) Dictionary

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Q. Which method allows applying custom row-wise functions?

  • (A) map()
  • (B) applymap()
  • (C) apply() with axis=1
  • (D) transform()

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Q. What will `df.sample(n=3)` do?

  • (A) Return the first 3 rows
  • (B) Return the last 3 rows
  • (C) Return 3 random rows
  • (D) Return rows with 3 in them

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