What is nil-coalescing operator?
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What are the characteristics of switch?
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?
What is the benefit of using guard statement in swift?
Does swift have a runtime?
What is lazy var in swift?
List some control transfer statements used in swift?
What is polymorphism in swift?
Is multiple inheritance possible in swift?
What is subscript in swift?
Explain some biggest changes in usernotifications.
What is unowned in swift?
How can we make a property optional in swift?