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App-Development-with-Swift-Certified-User日本語試験対策、App-Development-with-Swift-Certified-User最新日本語版参考書

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App-Development-with-Swift-Certified-User認証試験に合格したいのは簡単ではなく、いい復習方法は必要です。我々はあなたに詳しい問題と答えがあるApp-Development-with-Swift-Certified-User問題集を提供します。この問題集は我々の経験がある専門家たちによって開発されています。我々のすばらしいApp-Development-with-Swift-Certified-User問題集はお客様の試験への成功を確保することができます。

Apple App Development with Swift Certified User Exam 認定 App-Development-with-Swift-Certified-User 試験問題 (Q20-Q25):

質問 # 20
Complete the code that will add the BlueView to the NavigationStack and present the RedView modally.

|Complete the code by typing in the boxes.

正解：

解説：
NavigationLink, .sheet
Explanation:
This question falls under View Building with SwiftUI , specifically the domain covering multi-view apps with navigation stacks, links, and sheets . The first blank must be NavigationLink because SwiftUI uses a navigation link inside a NavigationStack to push or present a destination view as part of the navigation hierarchy. Apple's documentation states that people tap or click a NavigationLink to present a view inside a NavigationStack or NavigationSplitView. That matches the first code section, where tapping " Show Blue View " should navigate to BlueView().
The second blank must be .sheet because the code uses isPresented: $showRedView, which is the standard SwiftUI sheet modifier for modal presentation controlled by a Boolean binding. Apple documents sheet (isPresented:onDismiss:content:) as the modifier to use when you want to present a modal view when a Boolean becomes true. Since the button toggles showRedView, SwiftUI presents RedView() modally as a sheet.
So the completed structure is effectively:
NavigationLink( " Show Blue View " ) {
BlueView()
}
sheet(isPresented: $showRedView) {
RedView()
}
This directly aligns with SwiftUI navigation and modal presentation patterns in the App Development with Swift objective domains.

質問 # 21
Review the code.

You need to add the word " Great! " to the Capsule shape.
Complete the code by typing in the boxes.

正解：

解説：
overlay, Text
Explanation:
This question belongs to View Building with SwiftUI , particularly the domain involving positioning and/or laying out a single SwiftUI view with standard views and modifiers . To place text on top of a shape such as a Capsule, SwiftUI uses the overlay modifier. Apple documents overlay as a view modifier that layers one view in front of another, which is exactly what is needed here: the text should appear on top of the blue capsule rather than beside or below it. The second blank must therefore be Text , because SwiftUI uses a Text view to display string content like " Great! " .
The completed code is:
struct ContentView: View {
var body: some View {
Capsule()
.fill(.blue)
.frame(width: 200.0, height: 100.0)
.overlay(
Text( " Great! " )
.font(.largeTitle)
)
}
}
This works because Capsule() creates the shape, .fill(.blue) gives it the blue color, .frame(width:height:) sets its size, and .overlay(...) places the Text( " Great! " ) directly above that shape. This is a standard SwiftUI composition pattern: build a base view, then apply modifiers to style it and layer additional content. In App Development with Swift objectives, this aligns with understanding standard views, modifiers, and layout techniques in SwiftUI.

質問 # 22

Which two assignments of a value to direction are allowed? (Choose 2.)

A. direction = .north
B. direction = CompassPoint.north
C. direction = CompassPoint(north)
D. direction = direction.north
E. direction = north

正解：A、B

解説：
This question belongs to Swift Programming Language , specifically the domain covering basic Swift types and how Swift handles enumerations . The code defines an enum named CompassPoint with the cases north, south, east, and west, and then declares direction as type CompassPoint. In Swift, an enum case can be assigned using the fully qualified form CompassPoint.north, so B is valid. Swift also allows the shorthand form .north when the compiler already knows the expected type is CompassPoint, so D is also valid. Apple's Swift language documentation explains that once a variable is known to be of a specific enumeration type, you can set its value using the shorter dot syntax.
The other options are not allowed. A is invalid because enum cases are not assigned using constructor-style syntax like CompassPoint(north). C is invalid because north by itself is not enough unless it is written with dot shorthand in a context with inferred enum type. E is invalid because north is a case of the enum type, not a member accessed from the variable instance as direction.north. Swift enum cases are referenced from the enum type or by shorthand dot syntax, not as instance properties.

質問 # 23
Which two statements about building an app are true? (Choose 2.)

A. Your phone must always be physically attached to your Mac to run your apps from Xcode on it.
B. You can run an app on your phone and get debug information in Xcode.
C. You can run your app in the simulator with Generic iOS Device chosen.
D. You can preview a View in the Canvas without running your app.
E. You need a paid Apple Developer account in order to run your app on your phone.

正解：B、D

解説：
Comprehensive and Detailed Explanation From App Development with Swift domains:
This question belongs to Xcode Developer Tools , especially the objectives about using the Xcode interface, building and running an app, and debugging. A is true because Xcode supports SwiftUI previews in the canvas, allowing you to see a view's interface directly in Xcode without fully launching the entire app in the normal run workflow. Apple's documentation states that Xcode can display a preview of a custom SwiftUI view in the preview canvas and keep it updated as you make code changes.
D is also true because when you run an app from Xcode on a device, Xcode opens a debugging session in the debug area. Apple explicitly documents that after a successful build, Xcode runs the app and opens a debugging session, which means you can view debug information while the app is running on the phone.
The other options are false. B is false because a phone does not have to be physically attached at all times; modern Xcode workflows support device pairing and wireless development after setup. C is false because Generic iOS Device is not an actual simulator run target for launching the app like a specific simulator device. E is false because you do not need a paid Apple Developer Program membership merely to run an app on your own device for development; Apple provides support for development testing on devices with the required setup such as pairing and Developer Mode.

質問 # 24
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 = capitalCities + [ " Italy " : " Rome " ]
B. capitalCities.updateValue( " Rome " , forKey: " Italy " )
C. capitalCities.append([ " Italy " : " Rome " ])
D. capitalCities[ " Italy " ] = " Rome "
E. capitalCities[ " Rome " ] = " Italy "

正解：B、D

解説：
Comprehensive and Detailed Explanation From App Development with Swift domains:
This question falls under Swift Programming Language , specifically the domain for managing data using collection types , with emphasis on dictionaries . In Swift, a dictionary stores data as key-value pairs , so in this example the country name is the key and the capital city is the value. To add a new entry, Swift supports two standard approaches. The first is subscript assignment , which is shown in option C : capitalCities[ " Italy " ] = " Rome " . Apple's documentation explains that you can add a key-value pair to a dictionary by assigning a value for a new key through the dictionary subscript.
The second correct approach is option E : capitalCities.updateValue( " Rome " , forKey: " Italy " ). Apple documents that updateValue(_:forKey:) updates the value for an existing key, or adds a new key-value pair if the key does not already exist . That makes it equally valid for inserting " Italy " : " Rome " into the dictionary.
The incorrect options fail for different reasons. A reverses the key and value, making " Rome " the key and " Italy " the value. B is wrong because append is used with arrays, not dictionaries. D is not the standard valid insertion syntax for Swift dictionaries in this context; Swift's documented mutation approaches here are subscript assignment and updateValue. Therefore, the two correct answers are C and E .

質問 # 25
......

人々は自分が将来何か成績を作るようにずっと努力しています。IT業界でのあなたも同じでしょう。自分の能力を高めるために、App-Development-with-Swift-Certified-User試験に参加する必要があります。App-Development-with-Swift-Certified-User試験に合格したら、あなたがより良く就職し輝かしい未来を持っています。この試験が非常に困難ですが、実は試験を準備するとき、もっと楽になることができます。我々のApp-Development-with-Swift-Certified-User問題集を入手するのはあなたの進めるべきの第一歩です。

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