Which fragment represents a set of event occurrences that could happen multiple times during a single execution?

Which fragment represents a set of event occurrences that could happen multiple times during a single execution?

• A. opt combined fragment
• B. alt combined fragment
• C. loop combined fragment
• D. parallel combined fragment

Answer: (C)

In UML activity diagrams, a loop fragment is used when a set of actions may occur multiple times within a single overall execution. It wraps the repeated behavior and keeps driving it until a loop condition is met, allowing several iterations of the same event sequence to happen before the flow moves on. This matches the idea of multiple event occurrences happening during one execution, all within the same run. For contrast, an optional fragment lets the enclosed behavior occur zero or one time, not repeatedly. An alternative fragment chooses one path from several, executing only that path once per overall run. A parallel fragment splits the flow into concurrent branches, which may run simultaneously rather than repeating the same sequence multiple times in sequence.

In UML activity diagrams, a loop fragment is used when a set of actions may occur multiple times within a single overall execution. It wraps the repeated behavior and keeps driving it until a loop condition is met, allowing several iterations of the same event sequence to happen before the flow moves on. This matches the idea of multiple event occurrences happening during one execution, all within the same run.

For contrast, an optional fragment lets the enclosed behavior occur zero or one time, not repeatedly. An alternative fragment chooses one path from several, executing only that path once per overall run. A parallel fragment splits the flow into concurrent branches, which may run simultaneously rather than repeating the same sequence multiple times in sequence.