Python Dictionary MCQs with answers Page - 7

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Q. What is the output of `dict([(1, 2), (3, 4)])`?

  • (A) {1: 2, 3: 4}
  • (B) [1: 2, 3: 4]
  • (C) {(1, 2), (3, 4)}
  • (D) [(1, 2), (3, 4)]

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Q. What will be the result of `mydict['missing']` if 'missing' is not a key?

  • (A) None
  • (B) 0
  • (C) Raises KeyError
  • (D) False

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Q. What does `dict.clear()` do?

  • (A) Deletes the dictionary
  • (B) Clears all elements in the dictionary
  • (C) Returns the dictionary keys
  • (D) Returns None

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Q. Can a dictionary contain another dictionary as a value?

  • (A) Yes
  • (B) No
  • (C) Only one level allowed
  • (D) Only if converted to JSON

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Q. What does `d.popitem()` return?

  • (A) A key only
  • (B) A value only
  • (C) A tuple (key, value)
  • (D) A list of keys

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Q. What will `dict.fromkeys('abc', 0)` return?

  • (A) {'a': 0, 'b': 0, 'c': 0}
  • (B) {'abc': 0}
  • (C) ['a', 'b', 'c']
  • (D) Error

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Q. What happens when you use `update()` with overlapping keys?

  • (A) Raises Error
  • (B) Keeps old values
  • (C) Updates values with new ones
  • (D) Deletes duplicates

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Q. Which function converts a dictionary to a JSON string?

  • (A) json.to_string()
  • (B) json.stringify()
  • (C) json.dumps()
  • (D) json.encode()

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Q. Which of the following will cause a dictionary creation error?

  • (A) {'name': 'John'}
  • (B) {1: 'a', 2: 'b'}
  • (C) {[1, 2]: 'value'}
  • (D) {(1, 2): 'tuple'}

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Q. How can you get a list of all values in a dictionary?

  • (A) dict.getvalues()
  • (B) dict.values()
  • (C) dict.vals()
  • (D) dict.all()

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