I applied through their career web page. The process took 3 weeks. I received an email from the recruiter, and we talked on the phone for 30 minutes. Then, I moved to the technical interview. There were two stages during the phone call:

One stage involved the engineer asking classic iOS questions. The second stage was a code challenge.

I answered all the questions, and my code ran well, but it might not have been very efficient. I hadn't had time to reduce the time complexity. I thought it went well, but I received an email stating they wanted to continue with other candidates.

1. Explain memory management in iOS. Follow up: why do you use weak?

• Frame vs Bounds
• Describe NSNotification, Delegation, Key-Value Observing
• Explain ViewController and View lifecycle

You will create a feature; which one would you like to use UIView or UIWebView? Why?

I think there were a few more questions. I couldn't remember them all, but they were, on average, easy iOS questions.

1. Given the following strings: abcdbbb abcdddd abcesa

Write a function that returns the length of the common prefix in a string array. For example, if abc is a common prefix, the result is 3.