What Is True About Guards on Interaction Operands

question 54

Multiple Choice

What is true about guards on interaction operands?

• A) should not refer to any dynamic variables, i.e., to attributes of the lifelines
• B) must only cover one lifeline, namely the one lifeline having the first event occurrence of the interaction operand
• C) must always cover all lifelines covered by the operand
• D) must cover the same lifelines on all interaction operands within one combined fragment

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