Master the Five SOLID Principles of OOP System Design
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Questions and Answers

What is the Single Responsibility Principle (SRP)?

  • Each class should have only one job or responsibility. (correct)
  • If you have a parent class and one or more child classes, you should be able to use an object of any child class in place of an object of the parent class.
  • Classes should not be forced to implement interfaces they don't use.
  • Classes should be open for extension but closed for modification.

    • What is the Open/Closed Principle (OCP)?

  • Classes should be open for extension but closed for modification. (correct)
  • If you have a parent class and one or more child classes, you should be able to use an object of any child class in place of an object of the parent class.
  • Classes should not be forced to implement interfaces they don't use.
  • Each class should have only one job or responsibility.

    • What is the Liskov Substitution Principle (LSP)?

  • Each class should have only one job or responsibility.
  • Classes should be open for extension but closed for modification.
  • Classes should not be forced to implement interfaces they don't use.
  • If you have a parent class and one or more child classes, you should be able to use an object of any child class in place of an object of the parent class. (correct)

    • What is the Interface Segregation Principle (ISP)?

    <p>Classes should not be forced to implement interfaces they don't use. (B)</p> Signup and view all the answers

    What is the Dependency Inversion Principle (DIP)?

    <p>Both high-level modules and low-level modules should depend on abstractions. (A)</p> Signup and view all the answers

    What is loose coupling?

    <p>Classes or components have a minimal level of interdependence. (A)</p> Signup and view all the answers

    What is the purpose of using interfaces in achieving loose coupling?

    <p>To minimize the dependency between classes. (D)</p> Signup and view all the answers

    Study Notes

    SOLID Principles

    • Single Responsibility Principle (SRP): A class should have only one reason to change, meaning it should have only one responsibility or single purpose.

    Open/Closed Principle (OCP)

    • A software entity should be open for extension but closed for modification, meaning we can add new functionality without modifying existing code.

    Liskov Substitution Principle (LSP)

    • Derived classes should be substitutable for their base classes, ensuring that any code that uses a base class can work with a derived class without knowing the difference.

    Interface Segregation Principle (ISP)

    • A client should not be forced to depend on interfaces it does not use, promoting smaller, more focused interfaces that are more flexible and easier to maintain.

    Dependency Inversion Principle (DIP)

    • High-level modules should not depend on low-level modules, but rather both should depend on abstractions, reducing coupling and increasing flexibility.

    Loose Coupling

    • Loose coupling refers to the decoupling of components, allowing them to change independently without affecting each other, reducing dependencies and increasing system flexibility.

    Interfaces and Loose Coupling

    • Interfaces help achieve loose coupling by providing a contract for classes to implement, allowing them to be interchangeable and reducing dependencies between components.

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    Description

    Test your knowledge of OOP system design by taking this quiz on the five SOLID principles. Learn about the Single Responsibility Principle (SRP), Open-Closed Principle (OCP), Liskov Substitution Principle (LSP), Interface Segregation Principle (ISP), and Dependency Inversion Principle (DIP). Challenge yourself to apply these principles to real-world scenarios and become a better OOP programmer.

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