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What is ios layer?
What is object graph in ios?
Is viewdidload only called once?
How to do upload of large sized video file to server ? while uploading user presses “Homebutton” How long will execute?
How is it possible to improve battery life during execution of an application?
Differentiate between ‘assign’ and ‘retain’ keyword.
What is nsmanagedobjectcontext? What are the different concurrency types? Explain them.
Differentiate between release and pool drain?
How does the runtime handle message passing? What is message forwarding?
What is sandbox in iOS operating system?
Explain difference between nil and nil?
What is nsobject in ios?
How is retain different from assign?
Different types of persistent stores? Which all types can we have on ios?
What is the use of appdelegate in ios?
