Select the area in Xcode that allows you to display the Preview Canvas.
Correct Answer:
Explanation: This question belongs to Xcode Developer Tools , specifically the objective domain on identifying and using the features of the Xcode interface . In the screenshot, the correct area is the upper-right corner of the editor toolbar , where Xcode provides the control for editor display options. Apple's documentation explains that to show previews, you can use the editor controls and specifically notes that you can click the Adjust Editor Options button and choose Preview , which displays the preview canvas to the right of the editor. So, in hotspot terms, the correct selection is the editor options control near the top-right of the code editor , not the Run button, not the Inspector, and not the Project navigator. This aligns with Apple's preview workflow for SwiftUI in Xcode, where the canvas is shown from the editor display controls. Apple also describes the preview canvas as part of Xcode's interface for quickly visualizing UI changes while editing code.
Question 3
Complete the code that conforms to the View protocol by selecting the correct option from each drop-down list. Note: You will receive partial credit for each correct answer.
Correct Answer:
Explanation: This question belongs to View Building with SwiftUI , especially the domain covering positioning and/or layout a single SwiftUI View with standard Views and modifiers and the foundational structure of a SwiftUI view. In SwiftUI, a custom screen is typically declared as a struct that conforms to the View protocol. Apple's SwiftUI documentation shows the standard pattern: struct ScreenView: View { var body: some View { Text( " Hello " ) } } Here, struct is required because SwiftUI views are commonly defined as structures. View is required after the colon because the type must conform to the View protocol. body is the required computed property that returns the content of the view as some View. Apple documents that every conforming View type must provide a body property that describes its content. So the completed code is: import SwiftUI struct ScreenView: View { var body: some View { Text( " Hello " ) } } This is the canonical SwiftUI view declaration pattern and is one of the most fundamental concepts in App Development with Swift.
Question 4
Review the code snippet. What is the output from each print statement?
Correct Answer:
Answer the question by typing in the box. 10 Explanation: This question belongs to Swift Programming Language , specifically the domain covering structs, classes, properties, methods, and the difference between structures and classes . The key point is that Printer is declared as a class : class Printer { var copies: Int init(copies: Int) { self.copies = copies } } In Swift, classes are reference types . That means when you assign one class instance to another variable, both variables refer to the same object in memory rather than creating a separate copy. Apple's Swift language guide explains that classes are passed by reference, while structures are value types. So in this code: var printer1 = Printer(copies: 2) var printer2 = printer1 both printer1 and printer2 point to the same Printer instance. Next, this line changes the shared object: printer2.copies = 10 Because printer2 refers to the same instance as printer1, changing printer2.copies also changes printer1. copies. Therefore, when the code executes: print(printer1.copies) the output is 10 . This question tests one of the most important Swift concepts: classes are reference types , while structs are value types . If Printer had been a struct instead of a class, the result would have been different because assignment would copy the value rather than share the same instance.
Question 5
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:
