What is the most basic difference between Value and Reference types?

What is the type of Swift Enumerations?

Symbol used like a tuple to access arguments in Abbreviated Swift Closure syntax?

Swift Type is used to group multiple values into a single compound value? For example:let compoundValue = (3, 5)

Swift can compile alongside what other language?

Output of this segment of code: var x = 0 for index in 1...5 { ++x } print('(x)')

When the following code is executed, what it will do? funcfunc() { let layer = UIApplication.sharedApplication().keyWindow!.layer let scale = UIScreen.mainScreen().scale UIGraphicsBeginImageContextWithOptions(layer.frame.size, false, scale); layer.renderInContext(UIGraphicsGetCurrentContext()!) let s = UIGraphicsGetImageFromCurrentImageContext() UIGraphicsEndImageContext() UIImageWriteToSavedPhotosAlbum(s, nil, nil, nil) }

Select the most proper answer. import UIKit import AVFoundation … … … let r:AVAudioRecorder? do { r = try AVAudioRecorder(URL: soundFileURL, settings: rSettings) r.delegate = self r.meteringEnabled = true r.prepareToRecord() } catch let error as NSError { r = nil print(error.localizedDescription) }

What is the need for having structures?

In Swift, what's the correct way variables consist?

On which tag background color for the page can be set?