App-Development-with-Swift-Certified-User Zertifizierungsfragen - App-Development-with-Swift-Certified-User Prüfung

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

SectionObjectives
Topic 1: View Building with SwiftUI- Create multiple Views to implement app logic
- Position and/or layout a single SwiftUI View with standard Views and modifiers
- Use List Views to iterate through collections
- Extract Subviews to simplify the structure of an overlarge View
- Use @State, @Binding, @Environment, and/or Observable to share data between Views
- Create a multi-view app with navigation Stacks, Links, and/or Sheets
Topic 2: Swift Programming Language- Know how and when to apply control flow and loops
  • 1. Use logical operators
  • 2. Use Guard
  • 3. Use range operators
- Evaluate variable scope and shadowing
- Demonstrate the use of Optional types
  • 1. Apply Optional binding and Optional chaining (including but not limited to if let, guard let)
  • 2. Demonstrate how to unwrap Optionals safely
- Manage data using collection types
  • 1. Arrays
  • 2. Dictionaries
- Declare and use basic Swift types
  • 1. Interpret and use basic types
  • 2. Demonstrate the use of type casting in both safe and unsafe ways
  • 3. Describe and use data types and operators
  • 4. Demonstrate when to use constants and variables
- Demonstrate proper use of structs, classes
  • 1. Differentiate between structures and classes
  • 2. Define and use property observers
  • 3. Define and use properties and methods
  • 4. Differentiate between various initializers
- Use functions
  • 1. Create and call a function
  • 2. Demonstrate how to use a function's return value
  • 3. Implement default parameter values
  • 4. Customize internal, external, and anonymous naming of parameters in functions
  • 5. Organize and structure code
Topic 3: Xcode Developer Tools- Demonstrate how to build and run an app
  • 1. on the iOS simulator
  • 2. on the iOS device
- Identify and use the features of the Xcode interface
  • 1. Demonstrate how to access documentation and help
  • 2. Navigate Xcode
  • 3. Create and modify views with Interface Builder
- Use debugging techniques including, but not limited to, breakpoints, watchpoints, and logging to resolve errors
  • 1. Set breakpoints and step through code line by line

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Apple App Development with Swift Certified User Exam App-Development-with-Swift-Certified-User Prüfungsfragen mit Lösungen (Q25-Q30):

25. Frage
You are creating or updating human resource records for your employees. For each identifier, select whether it is a Constant or a Variable Note: You will receive partial credit for each correct answer.

Antwort:

Begründung:

Explanation:
* age - Variable
* birthDate - Constant
* socialSecurityNumber - Constant
* salary - Variable
* currentDepartment - Variable
This question belongs to Swift Programming Language , specifically the objective on demonstrating when to use constants and variables . In Swift, a constant is declared with let and is used for values that should not change after they are set. A variable is declared with var and is used for values that may change over time.
Birth date is a constant because a person's date of birth does not change. Social security number is also a constant because it is intended to be a fixed identifier for that employee record. By contrast, age is a variable because it changes over time. Salary is a variable because compensation can be adjusted. Current department is also a variable because an employee may transfer to another department.
This matches Swift best practice: use let for fixed data and var for mutable data. So in a human resources record, identifiers that are permanent should be constants, while values that can change during employment should be variables.


26. Frage
Review the code snippet and identify what happens when the program is executed.

Antwort: B

Begründung:
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 .


27. Frage
Which code correctly creates a size 300 rectangular Image View with rounded corners that displays the entire image, regardless of size?

Antwort: B

Begründung:
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.


28. Frage

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

Antwort: B,C

Begründung:
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.


29. Frage
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.

Antwort:

Begründung:


30. Frage
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