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Apple App Development with Swift Certified User Sample Questions:

1. Review the code.

When entered into the TextField, which number will display a blue canvas on the SecondView?

A) 4
B) 1
C) 3
D) 2

2. If View A calls View B, which Swift Property Wrapper would you use in View B in order to return the value of a state to View A?

A) @Observable
B) @Binding
C) @State
D) @Environment

3. Which two statements about building an app are true? (Choose 2.)

A) You can run an app on your phone and get debug information in Xcode.
B) You need a paid Apple Developer account in order to run your app on your phone.
C) You can run your app in the simulator with Generic iOS Device chosen.
D) You can preview a View in the Canvas without running your app.
E) Your phone must always be physically attached to your Mac to run your apps from Xcode on it.

4. Select the location to set this app to run on an iPhone 14 in the simulator.

5. Review the code.
struct ContentView: View {
let fruits = [ " Apple " , " Banana " , " Kiwi " ]
var body: some View {
List(fruits, id: \.self) { fruit in
Text(fruit)
.font(.headline)
.padding()
}
}
}
Which of the following statements is true about the code?

A) The id: \.self in the List view should be rewritten as id: /self
B) The List view is using the fruits array to display the contents as individual rows.
C) KeyPaths are used here to extract the font and padding properties dynamically.
D) The id: \.self in the List view is not necessary and may be omitted.

Solutions: