What is a lifeline?
A)it is a frame consisting of a rectangle with a pentagon inits upper left-hand corner
B)it is a rectangle containing an identifier with a dashed line extending below the rectangle
C)it is a name compartment ; the interaction is represented inside the rectangle
D)none of the mentioned

Question

Quizplus · Accepted Answer

A lifeline in UML (Unified Modeling Language) diagrams, particularly in sequence diagrams, is represented by a rectangle containing an identifier (representing an individual participant in the interaction) with a dashed line (the "lifeline") extending below the rectangle. This dashed line represents the existence of the participant over time during the interaction.

What Is a Lifeline