first_implementation.py

# views.py

def detail_quiz(request, pk):
    quiz = get_object_or_404(Quiz, pk=pk)
    return render_template(request, templatename, {'quiz': quix})

# in template

{# to show questions #}

{% if request.user == quiz.created_by or request.user in quiz.students.all() %}

{% for question in quiz.questions.all() %}
    {# show the questions %}
{% endfor %}
{% else %}
Only Registered user can see the questions
{% endif %}