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| Section | Weight | Objectives |
|---|---|---|
| Data Handling and Logic | 15% | - Basic data processing
|
| SwiftUI Basics | 25% | - Layout and navigation
|
| Development Environment | 15% | - Xcode interface and tools
|
| Swift Programming Fundamentals | 30% | - Functions
|
| App Design and Best Practices | 15% | - User experience principles
|
>> App-Development-with-Swift-Certified-User Valid Mock Exam <<
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NEW QUESTION # 32
Review the code snippet.
What will print after the final line of code is executed?
Answer:
Explanation:
Answer the question by typing in the box.
2
Explanation:
This question belongs to Swift Programming Language , specifically the objective on variable scope and shadowing .
The code first declares:
let even = 2
This creates a constant named even in the outer scope with the value 2.
Inside the for loop, the code declares another constant with the same name:
let even = num * 2
This inner even exists only inside the loop body. It shadows the outer even, which means that within the loop, the name even refers to the loop's local constant, not the original one. However, that inner constant goes out of scope at the end of each loop iteration.
After the loop finishes, the inner even no longer exists. So when the final line runs:
print(even)
Swift uses the original outer constant, which is still 2.
So the output is:
2
This question tests two important Swift concepts:
* Scope : where a variable or constant can be accessed
* Shadowing : when a local declaration temporarily hides another declaration with the same name Therefore, the correct answer is 2 .
NEW QUESTION # 33 
Which two assignments of a value to direction are allowed? (Choose 2.)
Answer: B,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 # 34
Given the function, which two function calls are valid? (Choose 2.)
Answer: A,E
Explanation:
This question belongs to Swift Programming Language , specifically the domain on functions , including internal and external parameter names and default parameter values .
The function is defined as:
func rightSum(_ num1: Int, by num2: Int, and num3: Int = 25) - > Int {
return num1 + num2 + num3
}
This means:
* the first parameter uses _, so it has no external label
* the second parameter must use the external label by
* the third parameter must use the external label and
* the third parameter also has a default value of 25, so it may be omitted Now evaluate each option:
* A is invalid because it uses num2: instead of the required external label by:
* B is valid because it correctly uses no label for the first argument, then by: and and:
* C is invalid because the first parameter cannot be called with num1: since the external label is omitted with _
* D is valid because it correctly passes the first argument unlabeled and the second with by:, while omitting the third argument so Swift uses the default value 25
* E is invalid because it uses num1: and num2: instead of the required calling syntax So the two correct function calls are B and D .
NEW QUESTION # 35
Review the code snippet.
The code snippet does not compile.
Which two actions will fix the errors? (Choose 2.)
Answer: C,E
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 # 36
Review the code.
var capitalCities = [ " USA " : " Washington D.C. " , " Spain " : " Madrid " , " Peru " : " Lima " ] Which two statements add the capital city of " Italy " to the dictionary? (Choose 2.)
Answer: C,E
NEW QUESTION # 37
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