Amazon SDE 1 interview questions

Final Interview over video: Q1: Given a list of strings, each string represents data of a truck in a fulfilment centre that is in and out of time. Return number of trucks at all hours of the day (e.g. 1st hour, 2nd hour, 3rd hour etc.). Q2: given 2 BSTs, return a single array of numbers, all sorted in ascending order. Q3: Design your own array but compress duplicate elements, User should be able to use the get() and set() methods like a regular array (, store the 1st 3 7s only once but if the user asks for the element at position 2, return correct number.