With this plugin administrator can easily and fast create complicated tests and user can't relax, answering this questions.
SSQuiz 2.0 is rethought and rewritten compared to previous versions. If you were using previous version, then your SSQuiz data will be converted to a new format on activation.
If you have problems with updating to 2.0 version you can downgrade it to 1.12.c
If you're uninstalling plugin, quizzes will stay on database. To delete them, Delete tables with names like 'ssquiz' in WordPress database.