I took an intro econ course in college in 1999. The professor gave us his past tests to use as practice and some of them dated back to the late 1950's.
A young man went back to visit his old economics professor, under whom he had studied many years earlier. He took a look at the final exam the professor was preparing to give the students. He said, "Professor, this exam is identical to the one you gave us year ago!"
The professor replied, "That's okay, all the answers have changed."
The term is "dynamic storage allocation." We're talking about something so old I'm afraid I can't explain beyond that. I am a mere programmer and I don't wear a lab coat.
A buddy of mine had a copy and I took the class for an easy A. The only gotcha is that you had to be physically present and give him advance notice of you were to be out.
My EM theory second year was quite tricky
It was 60 questions in 180 seconds. No hard calculations, just stuff you were an embarrassment to the prof if you passed EM and didn’t know.
He gave it right before break (3 hour class). I got a 96 first attempt. Next highest grade was a 30. He said I could leave as the remainder of class was to go over the test. I literally strutted out and said I was going to have a cold beer. Good times.