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UM0-200 · Question #51

What is true about guards on interaction operands?

The correct answer is B. must only cover one lifeline, namely the one lifeline having the first event occurrence of the interaction operand. See the full explanation below for the reasoning.

Question

What is true about guards on interaction operands?

Options

  • Amust always cover all lifelines covered by the operand
  • Bmust only cover one lifeline, namely the one lifeline having the first event occurrence of the interaction operand
  • Cshould not refer to any dynamic variables, i.e., to attributes of the lifelines
  • Dmust cover the same lifelines on all interaction operands within one combined fragment

How the community answered

(52 responses)
  • A
    8% (4)
  • B
    75% (39)
  • C
    2% (1)
  • D
    15% (8)

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