That's the bottleneck though. It's not on the students end. It's on the professor/instructor/grad student end. It's not uncommon at big universities to have cla

That's the bottleneck though. It's not on the students end. It's on the professor/instructor/grad student end. It's not uncommon at big universities to have classes with hundreds or even thousands of students. Even if the oral exam can be completed in half an hour and there's 10 professor/instructors/grad students that can evaluate them that's STILL 50 hours each in a class of 1000 students. With a written exam it's one two or three hour writing period, then marking. Some of the huge classes will do multiple choice only on Scantron sheets so marking is literally done in minutes. With the courses I've marked it usually takes much less than half an hour to mark an exam on average even if it took the student 3 hours to write.