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Apple App Development with Swift Certified User Sample Questions:

1. For each statement about Navigation in SwiftUI. select True or False.

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

3. Given the function, which two function calls are valid? (Choose 2.)

A) let sum r\ ght5um(100, by: 50)
B) let sum = rightSum(100, num2: SO, and: 20)
C) let Sun - rightSum(numl: 100, by: SO, and: SO)
D) let sun = rightSum(numl: 100, num2: 50)
E) let sum - rightSum(100, by: 30, and: 20)

4. Complete the code that conforms to the View protocol by selecting the correct option from each drop-down list.
Note: You will receive partial credit for each correct answer.

5. In SwiftUI, how can you extract a subview from a main view to make the code more modular?

A) Declare the subview as a variable inside the main view and call it directly.
B) Use @State to manage subview content and use a binding to create a two-way connection.
C) Add the subview's code directly into the main view's body.
D) Create a new SwiftUI view struct and call it in the main view.

Solutions: