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Apple App Development with Swift Certified User Sample Questions:

1. 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) @Environment
C) @Binding
D) @State

2. Review the code snippet and identify what happens when the program is executed.

A) Only menu items including " Pizza " . " Burger " , " Chicken " . " Pasta " . " Salad " are printed.
B) Only menu items including " Burger " . " Chicken " . " Pasta " . " Salad " are printed.
C) The for loop prints all the menu items in the array.
D) Only menu items including " Burger " . " Chicken " . " Pasta " . " SaJad " . " Steak " are printed.

3. Review the code snippet.

What is the value of answer after you run the code?

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

5. Review the code.
var capitalCities = [ " USA " : " Washington D.C. " , " Spain " : " Madrid " , " Peru " : " Lima " ] Which two statements add the capital city of " Italy " to the dictionary? (Choose 2.)

A) capitalCities[ " Rome " ] = " Italy "
B) capitalCities.append([ " Italy " : " Rome " ])
C) capitalCities[ " Italy " ] = " Rome "
D) capitalCities = capitalCities + [ " Italy " : " Rome " ]
E) capitalCities.updateValue( " Rome " , forKey: " Italy " )

Solutions: