Posted by: Pdfprep
Post Date: January 29, 2021
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
Answer: B
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