Consider the following code: var defaults = NSUserDefaults.standardUserDefaults() var userPref = defaults.stringForKey("userPref")! printString(userPref) func printString(string: String) { println(string) } Where is the bug? What does this bug cause? What’s the proper way to fix it?

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Why do we need closure in swift?

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What is data type in swift?

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What is the use of continue statement in swift loop?

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Is swift garbage collected?

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What are the advantages of using swift for ios development?

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Is it worth learning swift 2019?

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What language is swift most similar to?

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Which banks use swift?

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The following code snippet results in a compile time error: struct IntStack { var items = [Int]() func add(x: Int) { items.append(x) // Compile time error here. } } Explain why a compile time error occurs. How can you fix it?

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What is $0 in swift?

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How would you define variables and constants in swift programming language?

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