This is probably because interview questions are more often than not just brainteasers stacked on top of into-level content. Much in the same way that juniors i

This is probably because interview questions are more often than not just brainteasers stacked on top of into-level content. Much in the same way that juniors in high school taking Calculus still need to study for SAT math: it's not really consistent with measuring the content of advanced courses at top places.