Data point: The General written I took for Technician in 1958 included 5
"draw a diagram of X" questions. The General study guide from ARRL at the
time included 14 diagrams that might an applicant might be asked to draw.
I memorized all 14 diagarms.



That means that the exam grader needed to know the material as well.
Someone of that
skill level costs more to hire than someone who just uses an answer key
to a multiple
choice test.