Python Dictionary MCQs with answers Page - 4

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Q. Dictionaries in Python are:

  • (A) Immutable
  • (B) Ordered since Python 3.7
  • (C) Unordered always
  • (D) Not iterable

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Q. What does `dict.pop('key')` do?

  • (A) Removes and returns the value for 'key'
  • (B) Deletes the key only
  • (C) Removes all keys
  • (D) Raises an error always

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Q. What will happen if you assign a value to an existing key?

  • (A) It creates a duplicate key
  • (B) It updates the value
  • (C) It throws an error
  • (D) It deletes the key

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Q. Which of the following is not a dictionary method?

  • (A) update()
  • (B) get()
  • (C) append()
  • (D) popitem()

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Q. Which of the following can be a dictionary key?

  • (A) A list
  • (B) A dictionary
  • (C) A tuple
  • (D) A set

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Q. What does the `update()` method do?

  • (A) Removes a key
  • (B) Returns the length
  • (C) Adds key-value pairs from another dict
  • (D) Sorts the dictionary

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Q. How do you iterate over keys and values in a dictionary?

  • (A) for k, v in dict.items():
  • (B) for k, v in dict.get():
  • (C) for k, v in dict.elements():
  • (D) for k, v in dict.keys():

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Q. Which statement will throw a KeyError?

  • (A) dict.get('x')
  • (B) dict['x']
  • (C) 'x' in dict
  • (D) dict.keys()

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Q. How do you copy a dictionary?

  • (A) copy = dict
  • (B) copy = dict.clone()
  • (C) copy = dict.copy()
  • (D) copy = dict.duplicate()

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Q. Which of the following statements will correctly initialize an empty dictionary?

  • (A) my_dict = []
  • (B) my_dict = dict()
  • (C) my_dict = ()
  • (D) my_dict = set()

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