Class diagram

Entity Relationships:

1. Alternative:

   • Belongs to: MultipleChoiceQuestion
   • Represents the possible options for a multiple-choice question.

2. AlternativeRecord:

   • Belongs to: MultipleChoiceQuestionAttempt
   • Represents a user's selection for a multiple-choice question attempt.

3. Category:

   • Has many: Quiz
   • Represents a category under which quizzes are grouped.

4. Comment:

   • Belongs to: User, Quiz
   • Represents a user's comment on a quiz.

5. Feedback:

   • Belongs to: User
   • Represents feedback provided by a user.

6. MultipleChoiceQuestion:

   • Belongs to: Quiz
   • Has many: Alternative
   • Represents a question with multiple-choice options.

7. MultipleChoiceQuestionAttempt:

   • Belongs to: QuizAttempt
   • Has many: AlternativeRecord
   • Represents a user's attempt at a multiple-choice question.

8. PasswordResetToken:

   • Represents a token for resetting a user's password.

9. Question:

   • Belongs to: Quiz
   • Represents a generic question.

10. QuestionAttempt:

    • Belongs to: QuizAttempt
    • Represents a user's attempt at a question.

11. Quiz:

    • Belongs to many: User
    • Has many: Question
    • Has many: Tag
    • Represents a quiz created by a user.

12. QuizAttempt:

    • Belongs to: User, Quiz
    • Has many: QuestionAttempt
    • Represents a user's attempt at a quiz.

13. Tag:

    • Has many: Quiz
    • Represents a tag associated with a quiz.

14. TrueOrFalseQuestion:

    • Belongs to: Quiz
    • Represents a true/false question.

15. TrueOrFalseQuestionAttempt:

    • Belongs to: QuizAttempt
    • Represents a user's attempt at a true/false question.

16. User:

    • Has many: Quiz
    • Has many: QuizAttempt
    • Represents a user of the application.