[quiz]
quiz_id (PK)
title
description
(other options related to quizzes [shuffle, feedback, etc.])

[question]
question_id (PK)
title
type

[question_answers]
answer_id (PK)
question_id (FK - question table)
answer
feedback
points

[quiz_questions]
quiz_id (PK/FK - quiz table)
question_id (PK/FK - question table)
question_status

[quiz_attempts]
attempt_id (PK)
user_id (FK - user table)
quiz_id (FK - quiz table)
time_start
time_end
released

[quiz_attempt_answers]
attempt_id (PK/FK - quiz_attempts table)
answer_id (PK/FK - question_answers table)