As a middle manager I can confirm, I have a certain set of standard interview processes I apply but if the candidate is warranted to ask for an alternative approach to assess their skills in condensed time I can accommodate those situations too. Simply asking directly is most likely the best approach, suggesting a route is likely fastest to get an answer e.g. instead of 4x1hr can we do 1x1.5-2hr and reference your code for them to measure your skills overall.