UML Use Case Diagrams
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Questions and Answers

What is an actor in a use case diagram?

  • An actor in a use case diagram represents a programming language
  • Any entity interacting with the system (correct)
  • An actor in a use case diagram represents a mathematical equation
  • An actor in a use case diagram represents a physical object

    • Which of the following describe secondary actor?

  • Primary user of the system
  • Interacts with the system but is not the primary user or main actor (correct)
  • Does not interact with the system
  • Main actor in the system

    • What is the term used to describe the relationship between a superclass and its subclass in object-oriented programming?

  • Inheritance (correct)
  • Aggregation
  • Composition
  • Association

    • "'In a website project, a user will click the search button on an application's user interface and the application will send an SQL query to a database system." Based on the above scenario, who will be the secondary actor?

    <p>database system</p> Signup and view all the answers

    What is an ACTOR?

    <p>A person who portrays a character in a performance.</p> Signup and view all the answers

    Initial State is ...

    <p>In Data Flow Diagrams (DFDs), the initial state typically represents the starting point of a process or system. It's where data originates or enters the system.</p> Signup and view all the answers

    What is the symbol used to represent a data store in UML?

    <ul> <li></li> </ul> Signup and view all the answers

    What does the symbol 't' represent in a UML class diagram?

    <p>Public visibility</p> Signup and view all the answers

    A use case specification has one or more flow of events or pathways associated with it.

    <p>True</p> Signup and view all the answers

    Project Manager produces a use case diagram

    <p>False</p> Signup and view all the answers

    Study Notes

    Actors in UML

    • An actor in a use case diagram is a person, organization, or external system that interacts with the system being modeled.

    Secondary Actors

    • A secondary actor is an actor that is not primary, but still interacts with the system.
    • Examples of secondary actors include a database system or a third-party payment gateway.

    Object-Oriented Programming

    • The term used to describe the relationship between a superclass and its subclass in object-oriented programming is inheritance.

    Use Case Scenario

    • In the scenario, the user is the primary actor, and the database system is the secondary actor.
    • The user interacts with the system by clicking the search button, and the system responds by sending an SQL query to the database system.

    Actors

    • An actor is a person, organization, or external system that interacts with the system being modeled.
    • Actors can be primary or secondary.

    State

    • Initial State is the starting point of an object or system.

    UML Notations

    • The symbol used to represent a data store in UML is a rectangle with a horizontal line in the middle.
    • The symbol 't' represents a template in a UML class diagram.

    Use Case Diagrams

    • A use case specification has one or more flow of events or pathways associated with it.
    • A use case diagram is typically produced by a Project Manager or a Business Analyst to model the functional requirements of a system.

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    Description

    Test your knowledge of UML use case diagrams and learn about the role of actors in these diagrams. Identify the characteristics of an actor and how it interacts with the system. Improve your understanding of UML modeling concepts.

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