Assume !x means sending message x and ?x means receiving message x. Which operator should replace the text "op" in the combined fragment such that <lp, !q, ?q, ?p> is a valid trace.

The correct answer is E. par. See the full explanation below for the reasoning.

Question

Assume !x means sending message x and ?x means receiving message x. Which operator should replace the text "op" in the combined fragment such that <lp, !q, ?q, ?p> is a valid trace.

Options

Acritical
Bloop
Crem
Dalt
Epar

How the community answered

(17 responses)

A
6% (1)
B
12% (2)
D
6% (1)
E
76% (13)

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