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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
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. Navigation patterns and presentation
  • 2. Stacks, grids and alignment
- Views and controls
  • 1. Modifiers and styling
  • 2. Built-in UI components
- State management
  • 1. Basic state properties
  • 2. Data flow between views
Data Handling and Logic15%- Error handling
  • 1. Do-catch and optional handling
- Basic data processing
  • 1. Working with strings and numbers
Swift Programming Fundamentals30%- Control flow
  • 1. Conditional statements and loops
  • 2. Switch statements and pattern matching
- Collection types
  • 1. Arrays, dictionaries and sets
- Basic types and operators
  • 1. Data types, type inference and casting
  • 2. Constants and variables
- Structures and classes
  • 1. Properties, methods and initializers
- Functions
  • 1. Definition, parameters and return values
  • 2. Parameter customization and default values

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Apple App Development with Swift Certified User Exam Sample Questions (Q38-Q43):

NEW QUESTION # 38
Review the code snippet.

The code snippet does not compile.
Which two actions will fix the errors? (Choose 2.)

Answer: A,B

Explanation:
This question belongs to Swift Programming Language , especially the domains covering basic Swift types
, operators , and constants versus variables .
There are two compile problems in the snippet. First, unitPrice and shipping are inferred as Double, while quantity is inferred as Int. In Swift, arithmetic operands must have compatible types; Swift does not automatically mix Int and Double in one arithmetic expression. So unitPrice * quantity fails unless quantity is changed to Double or explicitly converted. That makes A a correct fix.
Second, the line totalCost += ... uses the compound assignment operator +=, which stores a new value back into the left-hand side. Swift requires the left-hand side of += to be mutable, so totalCost must be declared with var, not let. That makes D the second correct fix.
The other choices do not solve the actual compile issues. B is unnecessary because totalCost is already explicitly declared as Double, so 0 is valid there. C would still leave shipping as Double, so the mixed-type arithmetic problem remains. E is irrelevant because shipping is never reassigned. Therefore, the two correct answers are A and D


NEW QUESTION # 39

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

Answer: A,C

Explanation:
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.


NEW QUESTION # 40
Complete the code by selecting the correct option from each drop-down list to create the following screen.

Note: You will receive partial credit for each correct answer.

Answer:

Explanation:


NEW QUESTION # 41
Which code correctly creates a size 300 rectangular Image View with rounded corners that displays the entire image, regardless of size?

Answer: C

Explanation:
This question belongs to View Building with SwiftUI , specifically the objective on positioning and laying out a single SwiftUI view with standard views and modifiers.
The correct answer is D because it uses the right combination of SwiftUI image modifiers for all three requirements:
* the image is made resizable with .resizable()
* it is given rounded corners with .clipShape(RoundedRectangle(cornerRadius: 50))
* it displays the entire image with .aspectRatio(contentMode: .fit)
* it is sized with .frame(width: 300)
The key part is .aspectRatio(contentMode: .fit) . In SwiftUI, .fit scales the image so the whole image remains visible inside the available frame. That matches the requirement "displays the entire image, regardless of size." By contrast, .fill may crop part of the image, so options using .fill do not satisfy the requirement.
Why the others are wrong:
* Option A uses .fill, so the full image may not remain visible.
* Option B uses invalid modifiers such as .sizablc() and .size(width: 300), and also uses Rectangle (cornerRadius: 50), which is not the correct rounded-rectangle shape syntax.
* Option C also uses invalid syntax and .fill, which can crop the image.
* Option D uses valid SwiftUI syntax and the correct content mode.
So the correct choice is D , because it is the only option that correctly creates a 300-width image with rounded corners while ensuring the entire image is shown.


NEW QUESTION # 42
What is the code snippet an example of?

Answer: C

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 # 43
......

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