Swift Questions Set 9:
Swift is an ___________ language.
Solution:
What is an opaque type in Swift?
Solution:
What tool does Apple provide for developers to graphically design the user interface (UI) of an app?
Solution:
To which of the following inherited properties can property observers not be added?
Solution:
What do unsafe unowned references in Swift provide?
Solution:
What is the correct way to declare class-only protocols in Swift?
Solution:
Which one of the following is not allowed for methods of value types in Swift by default?
Solution:
Are the following lines of code correct in Swift?
struct MixedRectangle {
@SmallNumber var height: Int = 1
@SmallNumber(maximum: 9) var width: Int = 2
}
Solution:
What will be the output of the following lines of code?
struct SomeStruct {
static let mult = 8
static subscript(i: Int, j: Int) -> Int {
return mult * i * j
}
}
print(SomeStruct[8, 8])
Solution:
What will be the output of the following code?
var airports: [String: String] = ["YYZ": "Toronto Pearson", "DUB": "Dublin"]
var string = String()
for airportCode in airports.values {
string.append(airportCode)
}
print(string)
Solution:
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