I applied online and got online assessment. After the online assessment, I got a onsite interview. This is a 4-round interview, each one is about 45 minutes. You'll have 5-min break between 2 rounds. Most of them are technical questions, especially algorithms and data structure problems. Have some behavior questions during every round.

Valid Parentheses: Given a string having some brackets, determine if the input string is valid. - https://zigin.co/interview/detail/1139.page
Design how to recover a binary tree
OOP questions and multi-thread problems
Given a set of candidate numbers and a target number, determine whether there's a combination in C where the candidate numbers sums to the target number or not.