Pandas MCQs with answers Page - 2

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Q. What does `df.shape` return?

  • (A) Total elements
  • (B) List of column names
  • (C) Tuple of (rows, columns)
  • (D) Data types of columns

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Q. How to sort a DataFrame by a column 'Salary'?

  • (A) df.sort('Salary')
  • (B) df.sort_by('Salary')
  • (C) df.order('Salary')
  • (D) df.sort_values('Salary')

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Q. What does the `info()` method show?

  • (A) Only data types
  • (B) Only memory usage
  • (C) Data types, non-null counts, memory usage
  • (D) Only null values

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Q. Which method is used to fill missing values?

  • (A) fillna()
  • (B) replace_na()
  • (C) fixna()
  • (D) complete_na()

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Q. Which function merges two DataFrames on a common column?

  • (A) pd.combine()
  • (B) pd.concat()
  • (C) pd.merge()
  • (D) pd.mix()

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Q. How do you check for missing values in a DataFrame?

  • (A) df.checkna()
  • (B) df.hasna()
  • (C) df.isnull()
  • (D) df.missing()

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Q. What is the default axis for `drop()` in pandas?

  • (A) axis=0 (rows)
  • (B) axis=1 (columns)
  • (C) axis=None
  • (D) axis='index'

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Q. Which attribute gives the data types of each column?

  • (A) df.types
  • (B) df.dtypes
  • (C) df.datatypes
  • (D) df.columns.types

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Q. How do you rename columns in a DataFrame?

  • (A) df.rename(columns={'old':'new'})
  • (B) df.columns.rename()
  • (C) df.rename_column()
  • (D) df.set_columns()

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Q. Which function returns the number of non-null elements in each column?

  • (A) df.size()
  • (B) df.count()
  • (C) df.length()
  • (D) df.total()

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