How proficient are you in objective-c and swift? Can you briefly describe their differences?
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What is race condition in swift?
Why swift is faster?
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?
Explain the common execution states for a swift ios app (ios application lifecycle).
Why is swift important?
Is apple using swift?
What are the different control transfer statements used in swift?
Explain the difference between let and var in swift programming?
What is abstract class in swift?
What is mutable and immutable in swift?
Which compiler is used in swift?
How base-class is defined in Swift?
Apple iOS 
