IOS Meeting - Trivia

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iOS Meeting - Trivia Challenge

Test your knowledge of iOS programming concepts with our engaging quiz! Whether you're a seasoned developer or just starting out, this trivia will challenge your understanding of key topics.

11 Thought-provoking Questions
Multiple Choice & Checkbox Format
Great for Quick Learning

11 Questions3 MinutesCreated by CodingGuru57

What's the use of outerLoop?

let numbers = 1...100

outerLoop: for number1 in numbers {

for number2 in numbers {

if number1 == number2 && number1 * number2 == 144 {

print("Square found: \(number1)")

break outerLoop

}

Label the first iteration for an early exit

It doesn't compile 😖

Save the state of the iteration

Copy the value for each iteration

What does this function return?

func test(input: String) -> Character {

var value: Character = Character("1")

test: if !input.isEmpty {

for char in input {

if char == Character("h") {

continue test

}

value = Character("2")

}

return value

}

test(input: "hola mundo")

It doesn't compile 😖

What is the type of x and y?

let (x, y) = (1, 2)

Int

(Int, Int)

[Int: Int]

[Int]

Having a VERY long array... Which one is the slowest?

Nums.dropFirst()

Nums[1...]

Nums.suffix(from: 1)

Given an Array. Which one is faster?

Array.reversed()

Array.reverse()

Array is

Value Type

Reference Type

What is the type of a?
let (a) = 2

Int

(Int)

What's the value of a

let a = UIInt8.min

-255

255

What output will be produced by the code below?

class Starship {
    var type: String
    var age: Int
}

let serenity = Starship(type: "Firefly", age: 24)
print(serenity.type)

Firefly

Compile but do not print

Do not compile

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