My hardest interview was at Roblox (passing Google and Apple). After passing the normal coding + system design questions, they throw you at leadership who ask you a random analytical question. I struggled with knowing what sort of depth to go into, and asking clarifying questions did not help.
pretty sure the super hard question from airbnb is a very rote and standard med LC question <a href="https://leetcode.com/problems/trapping-rain-water/description/" rel="nofollow">https://leetcode.com/problems/trapping-rain-water/descriptio...</a>