Middle Level iOS Developer interview questions 1) App Thinning 2) Steps for pushing application to app store 3) How push notification works 4) How google TEZ app getting near devices for get and send money 5)Retain Concept in iOS 6)Memory management  in iOS 7)ARC means 8) Syntax for shared instance 9) optionals and unwraping 10) Design pattarns 11) Tab bar insertion between screens 12) how to load images in table view using urls for each image by smooth scrolling  13) Extenstions 14)Clousers 15)Life cycles  16)how Table view reusable works?