What is protocol in simple words?

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What is the difference between class and category?

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What is data encapsulation in objective-c?

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How to add object to nsarray objective c?

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What is the principle distinction between the function calls and messages?

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What is abstract class in objective c?

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What are blocks and how are they used?

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Is c++ objective c?

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What is an m file?

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Can objective c run on windows?

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What happens when you create a block?

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What is retain count?

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Is nsobject a parent class or a derived class?

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Can you retain delegates?

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What does r mean in xcode?

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