I was referred through a previous employer, and the process took about two months.

I set up a date for two one-hour interviews.

I then had a 45-minute preparation call with other candidates, where they explained the process and everyone could ask questions.

I wasn't feeling ready for the interview and asked to postpone it for two weeks, and the recruiter agreed.

The questions were not too difficult, but I struggled with the coding challenge. I'm also a sophomore in college and had to study some basic data structures and algorithms myself to be able to answer the questions properly.

Describe yourself and what you did.

Questions are under NDA, but the coding challenge was rather difficult. Otherwise, usual Objective-C and complexity questions.