Coding interview was a bit challenging for me. During this stage, they ask you some specific questions about software engineering and data structure. Had one big question, but was not able to make it.

The whole process took anout 1 week, 4 rounds in total, the first interview covers one coding question, max sum of sub array, some gerneral iOS questions like how you fell about Swift and some of your past experiences, the second round has a design question : how to implement a NSOperationQueue, the last two rounds mainly focus on Behaviourial Questions, like how you handle stress, how tto handle dispute with your teammates etc.