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Apple App-Development-with-Swift-Certified-User Exam Syllabus Topics:

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. Review the code snippet.

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

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

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

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

4. You have created a view which includes some formatted text:

You decide to extract this formatted text into a subview so that you can reuse the formatting for other texts.
You highlight the Text and choose Extract subview.
You refactor ExtractedView to BigGreenTextView.
You add the line let text: String to the extracted view above the body.
You replace " That ' s all folks " with a reference to text
How should you call this extracted View from the original View?

A) BigGreenTextView(text: " That ' s all folks " )
B) BigGreenTextView(text)
C) BigGreenTextView( " That ' s all folks " )
D) BigGreenTextView(text: text)

5. Which property wrapper allows you to read data from the system or device settings?

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

Solutions: