I didn't see anything like that mentioned in TA. It sounded like the same problems were being given to everyone -- and that the malicious behavior was in problem selection itself. Am I wrong?
One of the methods they used for doing this was to give the unwanted students a different set of problems on their oral exam.
The introduction adds that the Jewish (or otherwise "undesirable") students "were given these problems one after another until they failed one of them, at which point they were given a failing mark."