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Which one of the following statements is true about sequence diagrams?

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Which one of the following statements is true about sequence diagrams?

(a) A sequence diagram is class based

(b) A sequence diagram presents the participants of a system from right to left

(c) The vertical broken lines represent the lifetime of the class in the system

(d) A sequence diagram is object based

The question was posed to me in an online quiz.

I need to ask this question from Object and Design-2 topic in division Object Tools and Design and Variables in PHP of PHP

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Correct answer is (d) A sequence diagram is object based

Best explanation: A sequence diagram is object based rather than class based. It is used to model a process in a system step by step.

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