Mastering Interaction Diagrams

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Questions and Answers

Which of the following statements is true about interaction diagrams?

  • Interaction diagrams model the static aspect of a system
  • Interaction diagrams can be used in the implementation of class methods (correct)
  • Interaction diagrams describe the algorithm in detail
  • Interaction diagrams are built based on state diagrams

What is the difference between a sequence diagram and a collaboration diagram?

  • Sequence diagrams are an instance of class diagrams, while collaboration diagrams are based on activity diagrams
  • Sequence diagrams show the temporal sequence of interactions, while collaboration diagrams show the structural organization of objects and their interactions (correct)
  • Sequence diagrams are used for object creation and destruction, while collaboration diagrams are used for message sending
  • Sequence diagrams are used in multi-thread environments, while collaboration diagrams are used in single-thread environments

Which of the following is NOT a type of message in a sequence diagram?

  • CALL message
  • SEND message
  • RETURN message
  • DELETE message (correct)

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Study Notes

Interaction Diagrams

  • Interaction diagrams are used to visualize the interactions between objects in a system.
  • They are used to model the behavior of objects and how they interact with each other.

Sequence Diagram vs Collaboration Diagram

  • A sequence diagram focuses on the sequence of messages exchanged between objects, emphasizing the time-order of events.
  • A collaboration diagram focuses on the interactions between objects, emphasizing the relationships between objects.

Types of Messages in Sequence Diagram

  • There are four types of messages in a sequence diagram: synchronous, asynchronous, return, and lost.
  • Synchronous messages are used to represent a request and its immediate response.
  • Asynchronous messages are used to represent a request that does not require an immediate response.
  • Return messages are used to represent a response to a previous request.
  • Lost messages are used to represent a message that is lost or not received.

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