GMM's default setting for exams allows students to return to previously answered or viewed problems.

If this slider is on, the previously viewed and/or answered problems on an exam will not be locked or paused when the student closes GMM before handing in the exam.

A locked exam problem is an exam problem that a student has previously viewed and/or answered. Locked means that the student cannot return to the problem unless allowed by the teacher. To lock exam problems, a teacher moves the slider to gray (off).