App-Development-with-Swift-Certified-User Practice Test Fee & App-Development-with-Swift-Certified-User Exam Topics

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

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

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Apple App Development with Swift Certified User Exam Sample Questions (Q25-Q30):

NEW QUESTION # 25
What is the code snippet an example of?

Answer: A

Explanation:
This question belongs to Swift Programming Language , specifically the objective domain on Optional types and safe unwrapping . The snippet uses if let favoriteCol = favoriteColor { ... }, which is Swift's standard syntax for optional binding . Apple's documentation explains that optional binding is used to conditionally bind the wrapped value of an optional to a new constant or variable if the optional contains a value. That is exactly what this code does: if favoriteColor is not nil, its unwrapped String value is assigned to favoriteCol, and the code inside the if block runs.
This is not force unwrapping , because force unwrapping uses the ! operator, such as favoriteColor!. It is not optional chaining , because optional chaining uses ? to safely access properties, methods, or subscripts on an optional value. It is also not an implicitly unwrapped optional , which would be declared with String! rather than String?.
So the correct answer is C. Optional binding . This pattern is one of the most important safe-handling techniques in Swift because it lets you work with optional values only when they actually contain data, avoiding runtime errors and keeping control flow explicit.


NEW QUESTION # 26
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?

Answer: B

Explanation:
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 .


NEW QUESTION # 27
Review the code snippet.

What value does the code output?

Answer:

Explanation:
Answer the question by typing in the box.
2
Explanation:
This question belongs to Swift Programming Language , specifically the objectives covering functions , control flow , and default parameter values . The function is declared as func getAgeCategory(_ age: Int =
20) - > Int, which means if no argument is supplied, Swift uses the default value 20. Apple's Swift documentation explains that you can define a default value for any parameter, and that value is used when the caller omits that argument. Since the code calls getAgeCategory() with no parameter, the function executes using age = 20.
The conditional logic is then evaluated in order:
* if age > 64 # false, because 20 is not greater than 64
* else if age > 19 # true, because 20 is greater than 19
* so the function returns 2
Because Swift's if / else if control flow stops at the first true condition, the later checks are never reached once age > 19 succeeds. Apple describes Swift as supporting standard control flow including conditional branching, and this example is a direct use of that branching behavior.
Therefore, print(getAgeCategory()) outputs 2 , which corresponds to option B .


NEW QUESTION # 28
In SwiftUI, how can you extract a subview from a main view to make the code more modular?

Answer: D

Explanation:
Comprehensive and Detailed Explanation From App Development with Swift domains:
This question belongs to View Building with SwiftUI , specifically the objective about extracting subviews to simplify the structure of an overlarge view . The correct answer is C because the standard SwiftUI approach to modularizing a large interface is to create a separate custom view, usually as a new struct conforming to View, and then use that view inside the main view. Apple's tutorials and documentation repeatedly show this pattern: move part of the UI into its own SwiftUI view type, then compose the main screen from smaller view components.
Option A is not the primary SwiftUI pattern for extracting a reusable subview. Option B does the opposite of modularization, because it keeps everything in the same large body. Option D is about state management and data flow, not about extracting a visual component into its own reusable subview. Apple's SwiftUI materials emphasize composition, where views are lightweight and can be split into smaller reusable pieces for clarity, maintainability, and reuse. WWDC guidance also shows Xcode's "Extract Subview" workflow, which creates a separate view structure from selected UI code.


NEW QUESTION # 29
Review the code snippet and identify what happens when the program is executed.

Answer: B

Explanation:
This question belongs to Swift Programming Language , specifically the objectives covering arrays , loops
, and range operators . The array has 6 elements, so menuItems.count is 6. The loop uses the half-open range operator:
for index in 1.. < (menuItems.count - 1)
That becomes:
for index in 1.. < 5
In Swift, the half-open range operator a.. < b includes the lower bound but does not include the upper bound.
So this loop runs with index values 1, 2, 3, 4, not 0 and not 5.
Array subscripting uses those indexes to print:
* menuItems[1] # " Burger "
* menuItems[2] # " Chicken "
* menuItems[3] # " Pasta "
* menuItems[4] # " Salad "
That means " Pizza " at index 0 is skipped, and " Steak " at index 5 is also skipped. Swift arrays use zero- based indexing, and count returns the number of elements in the array.
Therefore, the program prints only " Burger " , " Chicken " , " Pasta " , and " Salad " , so the correct answer is A .


NEW QUESTION # 30
......

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