In a use case, which term describes the alternative path branching from the main success scenario?

In a use case, which term describes the alternative path branching from the main success scenario?

• A. Extensions
• B. Guarantees
• C. Subject
• D. Base use case

Answer: (A)

In use-case modeling, the alternative path branching from the main success scenario is described as an extension. Extensions capture optional or exceptional flows that augment the base use case and are attached at defined extension points, allowing the model to show what can happen when conditions trigger a different path without replacing the main sequence of events. For example, in a base use case like placing an order, an extension might cover applying a discount code or handling a payment failure—these extend the main flow rather than becoming the default path. The base use case, by contrast, represents that standard sequence of events. Guesses about guarantees aren’t used to label branching paths, and the subject refers to the actor or initiator, not the alternate flow. So the term that fits the description is extensions.

In use-case modeling, the alternative path branching from the main success scenario is described as an extension. Extensions capture optional or exceptional flows that augment the base use case and are attached at defined extension points, allowing the model to show what can happen when conditions trigger a different path without replacing the main sequence of events. For example, in a base use case like placing an order, an extension might cover applying a discount code or handling a payment failure—these extend the main flow rather than becoming the default path. The base use case, by contrast, represents that standard sequence of events. Guesses about guarantees aren’t used to label branching paths, and the subject refers to the actor or initiator, not the alternate flow. So the term that fits the description is extensions.