App-Development-with-Swift-Certified-User Exam, App-Development-with-Swift-Certified-User Prüfungsvorbereitung

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

SectionObjectives
Swift Programming Language- Demonstrate the use of Optional types
  • 1. Apply Optional binding and Optional chaining (including but not limited to if let, guard let)
  • 2. Demonstrate how to unwrap Optionals safely
- Manage data using collection types
  • 1. Dictionaries
  • 2. Arrays
- Use functions
  • 1. Implement default parameter values
  • 2. Customize internal, external, and anonymous naming of parameters in functions
  • 3. Demonstrate how to use a function's return value
  • 4. Organize and structure code
  • 5. Create and call a function
- Demonstrate proper use of structs, classes
  • 1. Define and use properties and methods
  • 2. Differentiate between various initializers
  • 3. Differentiate between structures and classes
  • 4. Define and use property observers
- Know how and when to apply control flow and loops
  • 1. Use Guard
  • 2. Use range operators
  • 3. Use logical operators
- Declare and use basic Swift types
  • 1. Demonstrate when to use constants and variables
  • 2. Interpret and use basic types
  • 3. Describe and use data types and operators
  • 4. Demonstrate the use of type casting in both safe and unsafe ways
- Evaluate variable scope and shadowing
Xcode Developer Tools- Demonstrate how to build and run an app
  • 1. on the iOS simulator
  • 2. on the iOS device
- Use debugging techniques including, but not limited to, breakpoints, watchpoints, and logging to resolve errors
  • 1. Set breakpoints and step through code line by line
- Identify and use the features of the Xcode interface
  • 1. Create and modify views with Interface Builder
  • 2. Navigate Xcode
  • 3. Demonstrate how to access documentation and help
View Building with SwiftUI- Position and/or layout a single SwiftUI View with standard Views and modifiers
- Use @State, @Binding, @Environment, and/or Observable to share data between Views
- Use List Views to iterate through collections
- Extract Subviews to simplify the structure of an overlarge View
- Create multiple Views to implement app logic
- Create a multi-view app with navigation Stacks, Links, and/or Sheets

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App-Development-with-Swift-Certified-User Prüfungsvorbereitung & App-Development-with-Swift-Certified-User Testking

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Apple App Development with Swift Certified User Exam App-Development-with-Swift-Certified-User Prüfungsfragen mit Lösungen (Q24-Q29):

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

Antwort:

Begründung:

Explanation:
* You can treat a NavigationLink like a button, and run some Swift code when it is pressed. - False
* NavigationSplitView can be used to do navigation differently on different device sizes. - True
* You can put a header on your present View in a NavigationStack using .navigationTitle. - True
* If you have a NavigationLink that goes to another View with a NavigationLink, you need to declare a NavigationStack at each level. - False This question belongs to View Building with SwiftUI , specifically the objective on creating a multi-view app with navigation stacks, links, and sheets . Statement 1 is False because NavigationLink is primarily a navigation control that pushes or presents a destination in a navigation container; Apple documents it as creating a navigation link that presents a destination, not as a general-purpose action control like Button.
Statement 2 is True because NavigationSplitView is designed for adaptive navigation and can present navigation in different ways depending on platform and available space. Apple documents NavigationSplitView as a container for navigation across multiple columns, and this adaptive behavior is exactly why it is used differently across device sizes.
Statement 3 is True because .navigationTitle(...) sets the navigation title for a view shown inside a navigation container. Apple explicitly describes a view's navigation title as something used to visually display the current navigation state of an interface.
Statement 4 is False because you do not need a separate NavigationStack at every level. Apple describes NavigationStack as the container that manages a stack of views, and NavigationLink pushes additional destinations onto that stack. Nested destinations can keep navigating within the same stack.


25. Frage
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.

Antwort:

Begründung:


26. Frage
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.

Antwort:

Begründung:

Explanation:

This question belongs to View Building with SwiftUI , especially the domain covering positioning and/or layout a single SwiftUI View with standard Views and modifiers and the foundational structure of a SwiftUI view. In SwiftUI, a custom screen is typically declared as a struct that conforms to the View protocol. Apple's SwiftUI documentation shows the standard pattern:
struct ScreenView: View {
var body: some View {
Text( " Hello " )
}
}
Here, struct is required because SwiftUI views are commonly defined as structures. View is required after the colon because the type must conform to the View protocol. body is the required computed property that returns the content of the view as some View. Apple documents that every conforming View type must provide a body property that describes its content.
So the completed code is:
import SwiftUI
struct ScreenView: View {
var body: some View {
Text( " Hello " )
}
}
This is the canonical SwiftUI view declaration pattern and is one of the most fundamental concepts in App Development with Swift.


27. Frage
Which code correctly creates a size 300 rectangular Image View with rounded corners that displays the entire image, regardless of size?

Antwort: C

Begründung:
This question belongs to View Building with SwiftUI , specifically the objective on positioning and laying out a single SwiftUI view with standard views and modifiers.
The correct answer is D because it uses the right combination of SwiftUI image modifiers for all three requirements:
* the image is made resizable with .resizable()
* it is given rounded corners with .clipShape(RoundedRectangle(cornerRadius: 50))
* it displays the entire image with .aspectRatio(contentMode: .fit)
* it is sized with .frame(width: 300)
The key part is .aspectRatio(contentMode: .fit) . In SwiftUI, .fit scales the image so the whole image remains visible inside the available frame. That matches the requirement "displays the entire image, regardless of size." By contrast, .fill may crop part of the image, so options using .fill do not satisfy the requirement.
Why the others are wrong:
* Option A uses .fill, so the full image may not remain visible.
* Option B uses invalid modifiers such as .sizablc() and .size(width: 300), and also uses Rectangle (cornerRadius: 50), which is not the correct rounded-rectangle shape syntax.
* Option C also uses invalid syntax and .fill, which can crop the image.
* Option D uses valid SwiftUI syntax and the correct content mode.
So the correct choice is D , because it is the only option that correctly creates a 300-width image with rounded corners while ensuring the entire image is shown.


28. Frage
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.)

Antwort: B,D


29. Frage
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