App-Development-with-Swift-Certified-User日本語版と英語版 & App-Development-with-Swift-Certified-User試験関連赤本

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

SectionWeightObjectives
Development Environment15%- Debugging techniques
  • 1. Breakpoints and step-through execution
  • 2. Logging and error resolution
- Xcode interface and tools
  • 1. Navigating project structure
  • 2. Using documentation and help resources
- Building and running apps
  • 1. Deploying to physical devices
  • 2. iOS Simulator usage
Data Handling and Logic15%- Basic data processing
  • 1. Working with strings and numbers
- Error handling
  • 1. Do-catch and optional handling
App Design and Best Practices15%- User experience principles
  • 1. Human Interface Guidelines
- Code organization
  • 1. Readability and maintainability
Swift Programming Fundamentals30%- Control flow
  • 1. Switch statements and pattern matching
  • 2. Conditional statements and loops
- Structures and classes
  • 1. Properties, methods and initializers
- Collection types
  • 1. Arrays, dictionaries and sets
- Basic types and operators
  • 1. Constants and variables
  • 2. Data types, type inference and casting
- Functions
  • 1. Parameter customization and default values
  • 2. Definition, parameters and return values
SwiftUI Basics25%- State management
  • 1. Basic state properties
  • 2. Data flow between views
- Views and controls
  • 1. Built-in UI components
  • 2. Modifiers and styling
- Layout and navigation
  • 1. Stacks, grids and alignment
  • 2. Navigation patterns and presentation

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Apple App Development with Swift Certified User Exam 認定 App-Development-with-Swift-Certified-User 試験問題 (Q33-Q38):

質問 # 33
Given the function definition, which two statements call the function correctly? (Choose 2.)

Based on the image provided, here is the text for each of the multiple-choice options:

正解：A、D

解説：
This question belongs to Swift Programming Language , specifically the objective on functions , including internal and external parameter names and default parameter values .
The function is defined as:
func schedule(who name: String, from starting: String, to ending: String, _ place: String = " Zoom " ) { print( " Appointment: meeting \(name) from \(starting) to \(ending) at \(place) " )
}
This means:
* the external parameter names are who, from, and to
* the internal parameter names are name, starting, and ending
* the last parameter uses _, which means it has no external label
* the last parameter also has a default value of " Zoom "
Now evaluate the options:
* A is incorrect because it uses place: as an external label, but _ place means no external label is allowed.
* B is correct because it uses the required external names who, from, and to, and it omits the last parameter, which is allowed because it has a default value.
* C is incorrect because it uses who:, from:, and to: correctly, but this function's first three parameters are not declared that way in the provided option set; the valid matching call style from the choices is not this one because the function's labels are paired with internal names in the declaration syntax shown in the question.
* D is incorrect because it uses the internal names name, starting, and ending as if they were external labels.
* E is correct because it uses the external labels who, from, and to, and omits the final unlabeled parameter, letting Swift use the default " Zoom " .
So the two correct answers are B and E .


質問 # 34
Review the code snippet.

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

正解：

解説：
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 .


質問 # 35
Review the code:

Given a struct called Animal, what line of code should be added on line 5 in order to produce the output shown?

正解：D

解説：
This question belongs to View Building with SwiftUI , especially the objective domain on using List views to iterate through collections and displaying model data in SwiftUI. In the code, animals is the data source passed into List(animals) { animal in ... }. That closure iterates through each element of the collection one at a time, and the parameter animal represents the current Animal instance for that row. To show the name of the current animal in the UI, the correct statement is Text(animal.name). SwiftUI's list documentation explains that each row inside a List must be a SwiftUI View, and a Text view is a standard way to display a string value for each item in the collection.
Option D is therefore correct because it accesses the name property of the current animal object being processed by the List closure. This is the standard SwiftUI pattern when iterating over identifiable model objects: pass the collection into List, receive each item in the closure, and build a row view from that item's properties. Apple's SwiftUI tutorials repeatedly use this collection-driven row-building pattern for lists and navigation.
The other options are incorrect for clear reasons. A incorrectly refers to the type name Animal instead of the current instance. B uses Animals with the wrong identifier and an invalid indexing approach. C also treats animal as an index rather than the current element object. Since the closure already gives you the current Animal, you directly access its property with animal.name.


質問 # 36
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.)

正解：A、E


質問 # 37
If View A calls View B, which Swift Property Wrapper would you use in View B in order to return the value of a state to View A?

正解：D

解説：
Comprehensive and Detailed Explanation From App Development with Swift domains:
This question belongs to View Building with SwiftUI , specifically the objective on using @State,
@Binding, @Environment, and observable data to share data between views.
The correct answer is @Binding because @Binding creates a two-way connection to a value that is owned by another view. In this scenario, View A owns the state, and View B needs to read and modify that value so the change is reflected back in View A. Apple's SwiftUI documentation describes a binding as a reference to a mutable value that is owned elsewhere, which is exactly the pattern used when a child view needs to update a parent view's state. ( developer.apple.com )
@State is not correct for View B here because @State is used for local state owned by that specific view. If View B used @State, it would manage its own separate copy rather than updating the parent's value.
@Environment is used to access values provided by the system or ancestor views, not for directly returning a specific parent state value in this pattern. @Observable is related to observable model objects and is not the direct property wrapper used in a child view for two-way parent-child state passing. ( developer.apple.com ) So when View A passes a state value into View B and expects updates to flow back, View B should use
@Binding .


質問 # 38
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