I mean, you could have a separate "prep test" which is an entirely different purpose and would have to be really super secret on questions and answers including timing.

Essentially, this checks if you bribed the right people to have the answers for previous tests or even this one, connections and decent enough memory.

Welcome to America's latest educational scam.

A test to gauge progress is supposed to be almost fully secret and unpredictable to not bias for people cramming previous answers.