Which of the following best describes a use case?

• A. A representation of how actors use a system to achieve a goal
• B. A static documentation of UI colors
• C. A collection of user stories
• D. A sequence of technical tasks

Answer: (A)

A use case describes how actors interact with a system to achieve a goal. It focuses on a specific user goal and the step‑by‑step interactions between the user (the actor) and the system to reach that goal, including the main flow and any alternate paths. This makes it the best description because it centers on user intent and the system’s responses, outlining the sequence of actions that accomplish a recognizable outcome.

Static documentation of UI colors isn’t about user interactions or goals; it’s more about design style and visual standards. A collection of user stories captures individual needs from a user perspective but generally doesn’t map out the interaction sequence with the system as a whole. A sequence of technical tasks describes implementation steps for developers rather than the user’s interaction with the system to achieve a goal.