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What is optional chaining?

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More Apple iOS Swift Interview Questions

Consider the following code: let op1: Int = 1 let op2: UInt = 2 let op3: Double = 3.34 var result = op1 + op2 + op3 Where is the error and why? How can it be fixed?

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What is closure in swift?

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Does swift have a garbage collector?

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Is swift garbage collected?

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Is apple using swift?

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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 a protocol in swift?

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Explain deinitializer in swift programming language?

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Explain what is optional chaining?

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What language is swift written?

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What do you mean by a deinitializer?

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