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Which of the following is an unordered collection of elements that may contain duplicates?

  • A.Set
  • B.Bag
  • C.List
  • D.Dictionary

Answer: B

Correct answer: Bag

A bag is unordered and permits duplicates, which is what distinguishes it from a set. The four collection types divide on exactly these two properties: a set is unordered without duplicates, a bag unordered with them, a list ordered, and a dictionary a collection of key-value pairs.

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