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Apple has introduced this programming language as multi-paradigm, general-purpose, and robust. Swift enables developers to build applications for iOS, Apple Watch, and Mac. its open-source availability, dynamic memory management, and expressive feature make it more adaptable.
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We not only want to feed you knowledge but we want you to know how questions are presented through real-time scenarios and how to diagnose their solutions. “Swift Q&A” practice session is carrying questions in the same format or structure as in the real exams. Plus, this practice session has 0 limitations. You will be free to browse questions of your own choice and check their answers as well at any time.
“Swift Online Test” is here for self-assessment. It is like a virtual exam where you need to answer the randomly selected questions one by one. But here you will have to submit the answers within a given time limit. In the end, this session will present all the right answers for your cross-checking.
Choose the answer that declares an optional closure.
var closureName: (parameterTypes) -> (returnType)
typealias closureType = (parameterTypes) -> (returnType)
var closureName: ((parameterTypes) -> (returnType))
let closureName: closureType = { … }
Answer:
var closureName: ((parameterTypes) -> (returnType))
What will be the output of the following code?
func abc(p: Double...) -> Double {
var sm: Double = O
for number in p[
sm += number
I
return sm I Double{p.count)
I
print(abc(6, 7.25, 16.75))
9.0
9.7
10.0
Code will generate compilation/runtime error.
Answer:
10.0