Composition Over Inheritance Quiz
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Questions and Answers

What is the principle that classes should favor polymorphic behavior and code reuse by their composition over inheritance from a base or parent class?

  • Inheritance over composition
  • Class composition
  • Polymorphic inheritance
  • Composition over inheritance (correct)
  • Which approach typically begins with the creation of various interfaces representing the behaviors that the system must exhibit?

  • Polymorphic inheritance
  • Inheritance over composition
  • Class composition
  • Composition over inheritance (correct)
  • What facilitates polymorphic behavior in the context of composition over inheritance?

  • Interfaces (correct)
  • Abstract classes
  • Inheritance
  • Class composition
  • What is often needed in practice to make new components, despite the preference for composition over inheritance?

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    What typically works hand-in-hand with object composition in the context of OOP?

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

    Study Notes

    Polymorphic Behavior and Code Reuse

    • Favoring polymorphic behavior emphasizes using interfaces and abstract classes to define expected behaviors, promoting flexibility in the system.
    • Code reuse is enhanced by composing objects that encapsulate distinct functionalities rather than relying solely on inherited traits from a parent class.

    Interface-Driven Approach

    • The composition approach typically begins by creating multiple interfaces that outline the essential behaviors required by the system, allowing for varied implementation.

    Facilitation of Polymorphic Behavior

    • Polymorphic behavior is facilitated through the use of interfaces and delegation patterns, enabling different classes to implement shared behaviors while maintaining their unique identities.

    Components Creation Needs

    • In practice, even with a composition preference, specific design patterns or base classes may be required to facilitate the creation of new components, ensuring compatibility and functionality.

    Relationship with Object Composition

    • Composition works hand-in-hand with object-oriented programming (OOP) principles, allowing for building complex objects by combining simpler components, thereby enhancing modularity and maintainability.

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    Description

    Test your understanding of composition over inheritance in object-oriented programming with this quiz. Explore the concept of favoring polymorphic behavior and code reuse through class composition rather than inheritance.

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