1 .Different between delegate and data source
 Different between objective -c and swift
 What is URL Session Data type?
 What is extension
 What is singleton pattern?
what is debugging?
 Life cycle of application and view controller
 What are the networking frameworks you have experience with?
 What is web services with authentication
 What is the new features in your app. Explain
 Do you have any app in purchase. Explain
 What is push notification?Do you have any experience with push notifications
 What is multithreading?
 what is the main advantages of swift?
 Do you post any apps in App Store?
 What is Safe Area Layout?
 What happen if we implement an another entity into to the existing project? App will crash or not. Explain.
 How do you implement firebase. Explain
 How do you set three buttons in a navigation bar?
 How do you set constrains for a label, image view and button in view controller ?
 Whether the Constrains for iPhone and iPad is same or not?
 Project description (locumap)
 Have you ever worked on without main.storyboard?
 What are the steps for cocoa pods?
 Why do we use cocoa pods instead of downloading GitHub application?
 What is location manager. Explain.
 What is synchronous and asynchronyous?