At the very beginning is phone interview and then coding interview(four rounds). The first round is about design, second is like behavioural interview, the last two rounds are coding interviews.
Interview questions [1]
Question 1
One question is similar to the "56. Merge Intervals" on leetcode. Given an array of intervals where intervals[i] = [starti, endi], merge all overlapping intervals, and return an array of the non-overlapping intervals that cover all the intervals in the input.