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An object can have which of the following multiplicities?

  • A.Zero
  • B.One
  • C.More than one
  • D.All of the above.

Answer: D

Correct answer: All of the above.

Multiplicity states how many objects may participate, and the permitted values include zero, exactly one, and many. An optional association is written 0..1, a mandatory one 1, and an unbounded one 1..* or *. It is the zero case that distinguishes an optional participation from a required one.

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