Apple App-Development-with-Swift-Certified-User - App Development with Swift Certified User Exam

This question belongs to Swift Programming Language , specifically the domain covering structs, properties, methods, and initializers .

A computed property does not store a value directly. Instead, it returns a value calculated from other data. That is why description is a computed property: it returns a string based on content.

A memberwise initializer is automatically provided by Swift for structs when their stored properties are initialized through parameters. So Document(content: " Greetings! " ) is using the struct’s memberwise initializer.

A type property belongs to the type itself rather than to an instance. In Swift, static var docCount = 0 is a type property because it is declared with static.

An instance method is a function that belongs to an instance of the struct or class. The display() method uses the instance’s content, so it is an instance method.

A type method is a method declared with static and belongs to the type itself. So static func increment() is a type method because it changes the shared type property docCount.

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.