OOAD: State Diagram Chapter 6

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Questions and Answers

What is the primary purpose of using an Activity diagram?

  • To represent a single object and how its behavior causes it to change state
  • To design a user interface
  • To model how different areas of work behave with each other and interact (correct)
  • To create a database schema

What is the main difference between a State diagram and an Activity diagram?

  • A State diagram is used to model an object's behavior, while an Activity diagram is used to model an object's structure
  • A State diagram is used to model multiple objects, while an Activity diagram is used to model a single object
  • A State diagram is used to model how different areas of work behave with each other and interact, while an Activity diagram is used to represent a single object and how its behavior causes it to change state (correct)
  • A State diagram is used to design a user interface, while an Activity diagram is used to create a database schema

What is a state in the context of a State diagram?

  • A condition that must be met for an object to change state
  • An event that triggers an object to change state
  • A sequence of actions performed by an object
  • A snapshot or a milestone of an object's behavior at a particular point in time (correct)

What is the primary purpose of transitions in a state chart diagram?

<p>To show the flow from one state to another (A)</p> Signup and view all the answers

What are the three components of a State diagram?

<p>State, Transition, and Event (D)</p> Signup and view all the answers

What notation is used to represent the start of a State in a Statechart diagram?

<p>State Start (B)</p> Signup and view all the answers

What is the purpose of decision points in a state chart diagram?

<p>To make a decision about which state to move to next (D)</p> Signup and view all the answers

What is an event in the context of a state diagram?

<p>A happening that the system needs to know about (A)</p> Signup and view all the answers

What is the purpose of synchronization bars in a state chart diagram?

<p>To synchronize states and ensure they are in sync (D)</p> Signup and view all the answers

Can a transition of an object from a state to another be paused in between?

<p>No, it cannot be paused (B)</p> Signup and view all the answers

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