True statements about use case relationships include that an Include relationship involves one use case always including another's behavior, an Extend relationship indicates conditional behavior extension, and a Generalization involves a child use case inheriting from a parent and potentially adding new behaviors. Hence, all of the options - Include, Extend, and Generalization - are correct.
When discussing use case relationships in software development and systems engineering, it's essential to understand the various types of relationships that can exist between use cases. Here are the truths about each relationship:
- Include relationship: This relationship implies that one use case (the base) will always include the behavior of another use case (the inclusion). It's as if the included use case's functionality is a mandatory part of the base use case's process.
- Extend relationship: This indicates a conditional insertion of behavior from one use case (the extension) into another (the base). The extended use case's behavior will occur only under certain conditions during the base use case's execution.
- Generalization relationship: Similar to inheritance in object-oriented programming, generalization in use cases means that a specialized child use case inherits the behavior of a more general parent use case. The child can also add new behavior or modify existing behavior.
Therefore, the correct statement is D. All of the above.