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Apple App Development with Swift Certified User Sample Questions:

1. Complete the code by selecting the correct option from each drop-down list to create the following screen.

Note: You will receive partial credit for each correct answer.

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

3. What is the code snippet an example of?

A) Implicitly unwrapped optional
B) Force unwrapping
C) Optional chaining
D) Optional binding

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

5. Review the code.

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

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

Solutions: