What is ipa?
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Can you please explain the difference between nsarray and nsmutablearray?
Define ipa?
What are the different store migration options? When are they used? How do they work? What is mapping model?
Why do we override drawrect: method?
How can mobile application errors be prevented?
What is retain counts?
Is the object retained if I call performSelector:withObject:afterDelay:?
Explain difference between nil and nil?
What is main thread checker?
How are non-atomic and atomic properties different? Which one is the default property for synthesized properties? When would a user operate one over the other?
Enlist frameworks for cocoa touch?
“BgTask “ ? how long execute?