App-Development-with-Swift-Certified-User Practice Questions

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 belongs to View Building with SwiftUI , specifically stacking views and applying modifiers. A ZStack layers views from back to front, so the first item becomes the background and later items appear on top. To match the screenshot, the black background must be the back layer, so Color.black goes first. The large white circle sits above that, so Circle() followed by .foregroundStyle(.white) comes next. Finally, the red heart image sits on top of the circle, so Image(systemName: " heart " ).resizable() followed by .foregroundStyle(.red).frame(width: 200, height: 200) must be last. SwiftUI’s Image.resizable() allows the symbol image to scale to the frame you apply, and foregroundStyle sets the visible color styling for the shape and symbol.

So the intended structure is:

ZStack {

Color.black

Circle()

.foregroundStyle(.white)

Image(systemName: " heart " ).resizable()

.foregroundStyle(.red)

.frame(width: 200, height: 200)

}

This produces a black background, a white circular shape, and a centered red heart on top, exactly as shown.