Swift Questions Set 6:
What data type is returned when a data type conversion can potentially fail?
Solution:
What is the exact opposite of opaque types?
Solution:
Which keyword is used to declare weak references or variables in Swift?
Solution:
What kind of initializer delegation is allowed for value types in Swift?
Solution:
Is it necessary to define the data types of the parameters in Swift closures?
Solution:
Which properties are used in Swift to get the minimum and maximum value of an integer type?
Solution:
What types of methods can be overridden in Swift?
Solution:
What will be the output of the following code?
func addTwoInts(_ a: Int, _ b: Int) -> Int {
return a + b
}
var mathFunction: (Int, Int) -> Int = addTwoInts
print(mathFunction(3, 9))
Solution:
When does Swift use default initializers for classes?
Solution:
What will be the output of the following code?
func swapTwoInts(_ a: inout Int, _ b: inout Int) {
let temporaryA = a
a = b
b = temporaryA
}
var someInt = 3
var anotherInt = 107
swapTwoInts(&someInt, &anotherInt)
print("someInt is now \(someInt), and anotherInt is now \(anotherInt)")
Solution:
Related Question Sets:
Related Topics:
Scroll to Top
