Answer / Mohini Singh

.m files in Xcode are source code files for Objective-C classes and objects. They typically contain both the class implementation (methods) and interface (header file) wrapped together.

What is class extension? Why do we require them?

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Explain the difference between uiwindow and uiview?

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What is extern objective c?

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What is m files document management?

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When will you use nsarray and nsmutablearray? Which one is faster?

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Who calls dealloc method?

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What is 'protocol' on objective c?

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Is objective c dynamically typed?

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

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Why swift is faster than objective c?

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What is a category in objective c?

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What is enum constant?

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