iOS Interview Questions and Answers with Sample Code

Top 10 most asked interview questions for an iOS Developer role, in a form of a mock interview.

Timecodes:

• 0:00 – Overview
• 0:21 – Daniel, the interviewer
• 1:50 – Why these questions?
• 2:30 – View Controller Life Cycle
• 11:55 – The difference between a struct and a class
• 18:20 – The difference between “frame” and “bounds” properties of an UIView
• 25:45 – Protocol Oriented Programming
• 32:03 – “defer” statement coding question
• 37:00 – GCD / DispatchQueue coding question
• 46:36 – MVC architecture (Model, View, Controller)
• 52:19 – “weak” and “unowned” keywords
• 56:54 – “lazy” keyword
• 1:01:52 – “@escaping” closure attribue and non-escaping closures