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      Question

      Which of the following is NOT one of the SOLID principles

      of software design?
      A Single Responsibility Principle Correct Answer Incorrect Answer
      B Open/Closed Principle Correct Answer Incorrect Answer
      C Interface Segregation Principle Correct Answer Incorrect Answer
      D Dependency Injection Principle Correct Answer Incorrect Answer
      E Liskov Substitution Principle Correct Answer Incorrect Answer

      Solution

      The SOLID principles are five core design principles in object-oriented programming that ensure software is modular, maintainable, and scalable. These principles are:

      1. Single Responsibility Principle (SRP): A class should have only one reason to change.
      2. Open/Closed Principle (OCP): Software entities should be open for extension but closed for modification.
      3. Liskov Substitution Principle (LSP): Subtypes must be substitutable for their base types.
      4. Interface Segregation Principle (ISP): Clients should not be forced to depend on interfaces they don’t use.
      5. Dependency Inversion Principle (DIP): High-level modules should not depend on low-level modules.
      While Dependency Injection is a programming concept that supports DIP, it is not explicitly a SOLID principle. Why Other Options Are Incorrect:
      • Single Responsibility Principle: Part of SOLID.
      • Open/Closed Principle: A core SOLID principle.
      • Interface Segregation Principle: Clearly defined in SOLID.
      • Liskov Substitution Principle: Integral to SOLID principles.

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