Create a course in Moodle 2.1. Create a quiz in it. Create some multianswer questions and add them to the quiz. (See the docs page for some example question texts that you can copy.) Attempt this quiz a few times as a student. Complete some attempts getting different scores. Leave some attempts open. Backup this course. Restore it as a new course. Review the original and restored attempts side-by-side and verify that they look identical.