Open-Closed Principle Quiz
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Questions and Answers

According to the open–closed principle (OCP), software entities should be:

  • Open and closed for both extension and modification
  • Open for extension, but closed for modification (correct)
  • Open for modification, but closed for extension
  • Closed for extension and modification
  • Who is credited for originating the term open–closed principle?

  • Alan Turing
  • Donald Knuth
  • Grace Hopper
  • Bertrand Meyer (correct)
  • Which technique is used to resolve the apparent dilemma in the open–closed principle?

  • Use of global variables
  • Direct modification of source code
  • Code duplication
  • Generalizations such as inheritance or delegate functions (correct)
  • The open–closed principle is one of the five SOLID principles of:

    <p>Object-oriented design</p> Signup and view all the answers

    What does it mean for a module to be 'open' according to Meyer's open–closed principle?

    <p>It is still available for extension</p> Signup and view all the answers

    Study Notes

    Open-Closed Principle (OCP)

    • Software entities should be open for extension but closed for modification.

    Origin of the Term

    • The term "open-closed principle" was originated by Bertrand Meyer.

    Resolving the Dilemma

    • Abstraction is the technique used to resolve the apparent dilemma in the open-closed principle.

    SOLID Principles

    • The open-closed principle is one of the five SOLID principles of object-oriented design.

    Module Openness

    • According to Meyer's open-closed principle, for a module to be 'open' means it is open to extension, but closed to modification.

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    Description

    Test your understanding of the open-closed principle in object-oriented programming with this quiz. Explore scenarios where software entities can be extended without modification, and assess your knowledge of this fundamental design principle.

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