What is base class in swift?

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The String struct doesn’t provide a count or length property or method to count the number of characters it contains. Instead a global countElements<T>() function is available. When applied to strings, what’s the complexity of the countElements function: O(1) O(n) and why?

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What are the control transfer statements used in swift?

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Does swift have header files?

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Explain core data.

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Where can we test the apple iphone apps if we don’t have an ios device?

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What is closure in swift?

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Are arrays structs in swift?

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What is a swift class?

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Does swift have a garbage collector?

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Can any be nil swift?

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In swift what is use of backticks while declaring a variable?

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