Unified Modeling Language (UML) Questions and Answers
UML Questions and Answers: Submit Your Question
b. Sequence diagram: the track the interaction between the objects. They are used for dynamic modeling.
|Is This Answer Correct?||3 Yes||0 No|
A sequence diagram shows the way of processes execute in a sequence. For example, the order of operations and the parameters.
► An activity diagram depicts the operational workflows.
► A sequence diagram is focused to represent interactions between different objects.
► Activity diagram shows the actions for various objects.
|Is This Answer Correct?||2 Yes||1 No|
The following are the elements of the use case diagrams:
Actors: An actor is one of the entities who perform certain actions. These roles are the actual business roles of the users in given system. An actor interacts with a use case of the system. For example, for a banking system, a customer is one of the actors.
Use Case: A use case is a use case diagram of UML represents a business functionality that is distinct. The use case should list the discrete business functionality that is specified in the problem statement. Every business functionality is a potential use case.
System boundary: A system boundary defines the scope of the system. The systems that use cases also need to be defined in the limits of the system. The system boundary is shown as a rectangle that spans all use cases of the system.
► Transitions: Transitions are represented by open arrow heads. Transitions are used to indicate the flow among elements in the diagram.
► Decision Points: The logical branching is depicted by the decision points.
► States: A state is shown in a rounded rectangle. States are indicated to mention the mile stones of processing in the activity diagrams.
► Relation/Association: Association among objects is linked by connecting them. The cardinality can be depicted by placing qualifiers on either ends.
► Messages: An arrow that commencing from one object to the destination object. This depicts the interaction between objects. The sequence or order of the interaction is depicted by the number.