The first round was with the Hiring Manager, focusing on general discussion around past projects and experience.

The second round involved basic iOS debugging and coding.

For the onsite interviews, there were four rounds:

• Architecture (no LeetCode was given; sample code was provided, and I was asked to fix errors).
• System design (this was generic, not iOS specific).
• iOS fundamentals (I was asked to implement/fix a couple of functions in pre-written playgrounds and also asked to build a simple UI. I bombed it badly, got nervous, and it was too much to complete within an hour. The good thing was that I was allowed to look up functions/implementations in Stack Overflow or Apple Docs).
• Behavioral.

The interview itself was not too hard, but they asked basic stuff, and I bombed the interview.

Tip: Practice basic stuff like concurrency and retain cycles, and you should be able to crack it.

Basic iOS questions: retain cycles, concurrency