In many exams, there will be a number of questions that refer to an image, a scenario, a case study, or data of some sort.  Currently, the easiest way to display this is all at once.  However, that means a lot of scrolling up and down, which students are reporting they find confusing (they easily lose track of where they are in the exam, and it increases the chance they might miss a question).  The only alternative (displaying one question at a time), means that the image/scenario/case study/data needs to be repeated with each question, which is cumbersome and confusing in its own way.