What is toll-free bridging and when is it useful?

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What are nsautoreleasepool?

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Explain types of protocol?

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What is the isa member?

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What happens if you add your just created object to a mutable array, and you release your object?

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Can we implement dealloc in arc? If yes, what is the need to do that?

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Who calls dealloc method? Can we implement dealloc in arc? If yes, what is the need to do that?

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How we can layout subviews in a view?

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Explain application life cycle or application states?

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Who calls dealloc method? Can we implement dealloc in arc?

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What is an extension?

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What is posing in objective c?

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Can we have multiple uiwindows in ios?

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Explain the difference between #import and #include in objective-c?

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What is the difference between #import and #include in objective-c?

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