What manual memory management?

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What is UICollectionView ?

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Define 'atomic' keyword?

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What is block in ios swift?

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How to measure your application's performance on an iphone device?

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A tableview with while tapping on cell show a popOver. and tapping on it move to another view controller, is it possible if yes? then how?

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Explain "private", "protected" and "public"?

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Would I be able to keep in touch with some c++ work in the equivalent .m record? Will it compile? Assuming no, what changes would it be a good idea for me to do to compile it?

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Explain about MVC Design patters

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. Apart from incorporating views and controls, what else an app can incorporate?

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What is the 'interface' and 'implementation'?

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If any app can run in the background, what about battery life?

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