1. Topic Based Interview Questions https://github.com/CameronBanga/iOS-Developer-and-Designer-Interview-Questions 2. Default Interview Questions: http://www.geekinterview.com/Interview-Questions/iOS 3. General Interview Question and Answers http://abhijeetbargeios.blogspot.in/
Learning iOS + Creating an iOS Application(iPhone + iPad) + Submit to Apple Store + get it approved by Apple + Generate Revenue from App is really outstanding and rewarded.