What does use core data mean in xcode?
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Difference between retain and assign ?
What is delegate protocol in ios?
If any app can run in the background, what about battery life?
Assume that an app is not in foreground but is still executing code. In which state will it be in?
What is 'notification'?
What is delegate in ios with example?
What is uikit in ios?
What is xib?
Difference between sax parser and dom parser ?
What is iOS?
What is atomic and non atomic in ios?
Explain Appstore uploading process