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Question

What is a guard in the context of a sequence diagram?

a.

A label

b.

A boolean expression

c.

A vertical arrangement

d.

An order

Posted under Software Engineering

Answer: (b).A boolean expression Explanation:A guard in the context of a sequence diagram is a boolean expression that states the condition which must hold for the message to be sent. It is labeled on the message.

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Q. What is a guard in the context of a sequence diagram?