For multiple choice questions, it may work better. In fact, don't theory driving exams alrady use computers?
Yes they are done on computer and you get your result there and then. There is also a clock in the top corner counting down you time left, the option to flag a question you are not sure about to come back to at the end and a chance to review all answer before submitting. By the time you have picked up your bag and walked to the front desk, your result is waiting for you. (Ex Driving Instuctor so know the deal!! lol) And excellent system for multiple choice answers. Like you say not sure it would work for longer questions.