SOFTWARE DESIGN
OBJECT ORIENTED DESIGN
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It is a frame consisting of a rectangle with a pentagon in its upper left-hand corner
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It is a rectangle containing an identifier with a dashed line extending below the rectangle
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It is a name compartment; the interaction is represented inside the rectangle
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None of the mentioned
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Detailed explanation-1: -Explanation: Lifeline is a rectangle containing an identifier with a dashed line extending below the rectangle. Take Software Architecture and Design Mock Tests-Chapterwise! 6.
Detailed explanation-2: -Lifeline represents the existence of an object over a period of time. A vertical dotted line extending from the object is used to denote a lifeline. • Activation represents the time during which an object is performing an operation. Thin rectangles placed on lifelines are used to denote activations.
Detailed explanation-3: -An object is shown as a vertical dashed line called a lifeline. Lifeline represents the existence of object at a particular time. An object symbol is drawn at the head of the life line. Name of object & its class are separated by a colon & underlined.