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Apple App-Development-with-Swift-Certified-User Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Xcode Developer Tools | - Identify and use the features of the Xcode interface
|
| Topic 2: Swift Programming Language | - Evaluate variable scope and shadowing - Use functions
|
| Topic 3: View Building with SwiftUI | - Extract Subviews to simplify the structure of an overlarge View - Create a multi-view app with navigation Stacks, Links, and/or Sheets - Use @State, @Binding, @Environment, and/or Observable to share data between Views - Use List Views to iterate through collections - Create multiple Views to implement app logic - Position and/or layout a single SwiftUI View with standard Views and modifiers |
Apple App Development with Swift Certified User Sample Questions:
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 " ])
Correct Answer: B,D 🗳️
Select the location to set this app to run on an iPhone 14 in the simulator.
Correct Answer:
Explanation:
This question belongs to Xcode Developer Tools , specifically the domain for building and running an app on the iOS simulator . In Xcode, the place where you choose whether the app runs on a simulator or a connected device is the run destination / scheme destination selector in the toolbar. This control appears near the top center of the Xcode window and displays the current destination, such as a simulator model or device target. To run the app on iPhone 14 , you click that selector and choose iPhone 14 from the available simulator list. Apple's Xcode documentation describes choosing a run destination before building and running the app in Simulator or on a device.
So, for the hotspot, the correct place is the device/simulator dropdown in the top toolbar , not the preview canvas controls, not the project navigator, and not the code editor. That selector determines where the app launches when you press Run.
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: text)
- C. BigGreenTextView( " That ' s all folks " )
- D. BigGreenTextView(text)
Correct Answer: A 🗳️
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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. Change the initial value of totalCost from o to 0.0.
- C. Chang the type of unitPrice from Double to Int.
- D. Change totalCost from let to var to make it mutable.
- E. Change the type of quantity from int to Double .
Correct Answer: D,E 🗳️
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When you press ' Show Button ' on your app. a modal View appears.
Complete the code by selecting the correct option from each drop-down list.
Note: You will receive partial credit for each correct answer.
Correct Answer:
Explanation:
This question belongs to View Building with SwiftUI , specifically the domain on creating a multi-view app with navigation stacks, links, and sheets .
To present a modal view in SwiftUI when a Boolean state changes, the correct modifier is .sheet . The matching sheet API for a Boolean binding is:
sheet(isPresented: $showInfo) {
// modal content
}
So the first blank must be .sheet , and the second blank must be (isPresented: .
The logic works like this:
* @State stores the local Boolean that controls presentation.
* Pressing the button calls showInfo.toggle(), changing the value from false to true.
* When that Boolean becomes true, the .sheet(isPresented:) modifier presents the modal view.
* When the modal is dismissed, SwiftUI updates the Boolean back as needed.
There is also a typing issue in the screenshot: the state variable appears as ShowInfo, while the button and binding use showInfo. Swift is case-sensitive, so those names must match. The corrected code should use the same identifier consistently, such as:
@State var showInfo = false
Therefore, the correct dropdown selections are:
sheet
(isPresented:
