What are layer objects and what do they represent in iOS operating system?
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What is the significance of autorelease?
Different types of persistent stores? Which all types can we have on ios?
how push notification works?
what are the source items used by Xcode?
Which API is used to write test scripts that help in exercising the application's user interface elements?
Explain differentiate between release and pool drain?
Explain @property ,@synthesize
What performance issues can you face when using coredata?
What is context in core data ios?
What does exc_bad_access mean?
what are the new features in Xcode 6?
what is protocol? . The use of protocol?