What kind of diagram is an activity diagram?

What kind of diagram is an activity diagram?

• A. Sequence
• B. Behavior
• C. Class
• D. Deployment

Answer: (B)

Activity diagrams model the dynamic flow of a process or algorithm by showing the sequence of activities, decisions, and parallel paths. They capture how a system behaves over time, focusing on what happens rather than the static structure. In an activity diagram you start at an initial node, trace actions as steps, use decision points to represent branches, and include forks or joins to show parallel activities, all ending at a final node. This makes them a type of behavior diagram in UML, used to illustrate workflows, business processes, or algorithms. They differ from sequence diagrams, which emphasize the order of messages between objects; class diagrams, which depict static system structure; and deployment diagrams, which map software components to hardware.

Activity diagrams model the dynamic flow of a process or algorithm by showing the sequence of activities, decisions, and parallel paths. They capture how a system behaves over time, focusing on what happens rather than the static structure. In an activity diagram you start at an initial node, trace actions as steps, use decision points to represent branches, and include forks or joins to show parallel activities, all ending at a final node. This makes them a type of behavior diagram in UML, used to illustrate workflows, business processes, or algorithms. They differ from sequence diagrams, which emphasize the order of messages between objects; class diagrams, which depict static system structure; and deployment diagrams, which map software components to hardware.