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What is the use of double question mark “??” In swift?


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More Apple iOS Swift Interview Questions

Explain the common execution states for a swift ios app (ios application lifecycle).

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What will you do if your app is prone to crashing?

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What is interface in swift?

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

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Is swift coding easy?

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Explain what is half-open range operator?

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What is swift stand for?

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What are the collection types available 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 is the characteristics of switch in swift?

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What is swift programming?

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