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

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

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Apple App Development with Swift Certified User Exam Sample Questions (Q16-Q21):

NEW QUESTION # 16
In SwiftUI, how can you extract a subview from a main view to make the code more modular?

Answer: B

Explanation:
Comprehensive and Detailed Explanation From App Development with Swift domains:
This question belongs to View Building with SwiftUI , specifically the objective about extracting subviews to simplify the structure of an overlarge view . The correct answer is C because the standard SwiftUI approach to modularizing a large interface is to create a separate custom view, usually as a new struct conforming to View, and then use that view inside the main view. Apple's tutorials and documentation repeatedly show this pattern: move part of the UI into its own SwiftUI view type, then compose the main screen from smaller view components.
Option A is not the primary SwiftUI pattern for extracting a reusable subview. Option B does the opposite of modularization, because it keeps everything in the same large body. Option D is about state management and data flow, not about extracting a visual component into its own reusable subview. Apple's SwiftUI materials emphasize composition, where views are lightweight and can be split into smaller reusable pieces for clarity, maintainability, and reuse. WWDC guidance also shows Xcode's "Extract Subview" workflow, which creates a separate view structure from selected UI code.


NEW QUESTION # 17
Review the code snippet.

What will print after the final line of code is executed?

Answer:

Explanation:
Answer the question by typing in the box.
2
Explanation:
This question belongs to Swift Programming Language , specifically the objective on variable scope and shadowing .
The code first declares:
let even = 2
This creates a constant named even in the outer scope with the value 2.
Inside the for loop, the code declares another constant with the same name:
let even = num * 2
This inner even exists only inside the loop body. It shadows the outer even, which means that within the loop, the name even refers to the loop's local constant, not the original one. However, that inner constant goes out of scope at the end of each loop iteration.
After the loop finishes, the inner even no longer exists. So when the final line runs:
print(even)
Swift uses the original outer constant, which is still 2.
So the output is:
2
This question tests two important Swift concepts:
* Scope : where a variable or constant can be accessed
* Shadowing : when a local declaration temporarily hides another declaration with the same name Therefore, the correct answer is 2 .


NEW QUESTION # 18
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.

Answer:

Explanation:


NEW QUESTION # 19
Review the code.

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

Answer: C

Explanation:
This question belongs to View Building with SwiftUI , especially the domain on creating multiple views to implement app logic and sharing values between views. In FirstView, the value typed into the TextField is stored in number, which is a String. When the NavigationLink is tapped, the code passes Int(number) ?? 0 into SecondView. In Swift, converting a string to an integer with Int(...) uses an optional initializer, which means it returns an optional value and will produce nil if the string cannot be converted. The ?? 0 nil- coalescing operator then supplies 0 if conversion fails.
Inside SecondView, the body is:
Color(passedNumber == 3 ? .blue : .red)
This uses the ternary conditional operator. If passedNumber equals 3, the displayed color is blue; otherwise, it is red. Therefore, entering 3 into the TextField causes Int(number) to become 3, which makes the condition passedNumber == 3 true and displays a blue canvas. Any other listed number results in red.
So the correct answer is A. 3 . This matches the SwiftUI pattern of taking user input, converting it to the needed type, passing it into another view, and rendering UI conditionally based on that value.


NEW QUESTION # 20
Which property wrapper allows you to read data from the system or device settings?

Answer: A

Explanation:
Comprehensive and Detailed Explanation From App Development with Swift domains:
This question belongs to View Building with SwiftUI , specifically the objective about using property wrappers such as @State, @Binding, and @Environment to manage and share data between views.
The correct answer is @Environment because it is used to read values provided by the system or the surrounding view environment. These values can include device-related or system-provided information such as size classes, color scheme, locale, and dismiss actions. In SwiftUI, @Environment gives a view access to contextual information that it does not own directly, but which is supplied by the framework or ancestor views.
The other options are not correct for this purpose:
* @State is used for local mutable state owned by the current view.
* @Binding is used to create a two-way connection to state owned elsewhere, usually in a parent view.
* @StateObject is used to create and own an observable reference-type object for the lifetime of the view.
So if you want a SwiftUI view to read data coming from system or device settings, the correct property wrapper is @Environment .


NEW QUESTION # 21
......

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