Swift (iOs) MCQs with answers Page - 14

Here, you will find a collection of MCQ questions on Swift (iOs). Go through these questions to enhance your preparation for upcoming examinations and interviews.

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A

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Q. Which Swift feature allows multiple values to be returned from a function?

  • (A) Array
  • (B) Tuple
  • (C) Dictionary
  • (D) Struct

A

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Q. Which keyword is used to define an extension in Swift?

  • (A) extend
  • (B) extension
  • (C) extends
  • (D) add

A

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Q. How can you declare a variable that cannot be changed after initialization?

  • (A) let name = "Swift"
  • (B) var name = "Swift"
  • (C) static name = "Swift"
  • (D) final name = "Swift"

A

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Q. Which of the following keywords is used to exit a function early?

  • (A) break
  • (B) continue
  • (C) exit
  • (D) return

A

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Q. What is the default access level in Swift?

  • (A) public
  • (B) private
  • (C) internal
  • (D) open

A

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Q. Which of these defines a class in Swift?

  • (A) class MyClass {}
  • (B) Class MyClass {}
  • (C) def class MyClass {}
  • (D) create class MyClass {}

A

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Q. Which keyword is used to declare a computed property?

  • (A) get
  • (B) return
  • (C) computed
  • (D) var with a body

A

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Q. What is the output of the following code?

Code: 
let list = [1, 2, 3, 4, 5]
print(list.first)
  • (A) 1
  • (B) [1]
  • (C) Optional(1)
  • (D) Error

A

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Q. What is the result of the following code?

Code: 
let numbers = [1, 2, 3]
print(numbers.isEmpty)
  • (A) true
  • (B) false
  • (C) nil
  • (D) Error

A

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Q. Which of the following is used to observe property changes in Swift?

  • (A) onChange
  • (B) didSet
  • (C) observe
  • (D) watch

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