Apple App Development with Swift App-Development-with-Swift-Certified-User

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Apple App Development with Swift Certified User Sample Questions:

1. Review the code snippet.

The code snippet does not compile.
Which two actions will fix the errors? (Choose 2.)

A) Change the type of quantity from int to Double .
B) Chang the type of unitPrice from Double to Int.
C) Change shipping from let to var to make it mutable.
D) Change the initial value of totalCost from o to 0.0.
E) Change totalCost from let to var to make it mutable.

2. Given the function definition, which two statements call the function correctly? (Choose 2.)

Based on the image provided, here is the text for each of the multiple-choice options:

A) schedule(who: " Jane Doe " , from: " 9:30am " , to: " 10:30am " , place: " Office " )
B) D. schedule(name: " Jane Doe " , starting: " 9:30am " , ending: " 10:30am " , place: " Office " )
C) schedule(who name: " Jane Doe " , from starting: " 9:30am " , to ending: " 10:30am " )
D) E. schedule(who: " Jane Doe " , from: " 9:30am " , to: " 10:30am " )
E) schedule(who: " Jane Doe " , from: " 9:30am " , to: " 10:30am " , " Office " )

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

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

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

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

Solutions: