Swift (iOs) MCQs with answers Page - 7

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

Admin • 802.91K Points
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Q. Which of the following keywords is used to define an enumeration in Swift?

  • (A) enum
  • (B) enumeration
  • (C) list
  • (D) case

A

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Q. What will the following Swift code print?

Code: 
let a = 4
let b = 2
debugPrint(a / b)
  • (A) 2
  • (B) 2.0
  • (C) 2.00
  • (D) Error

A

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Q. Which of the following defines a function with no parameters and no return value in Swift?

  • (A) func hello() -> Void {}
  • (B) function hello {}
  • (C) def hello():
  • (D) void hello() {}

A

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Q. What will the following Swift code output?

Code: 
let temperature = 30
print(temperature >= 25 && temperature <= 35)
  • (A) true
  • (B) false
  • (C) nil
  • (D) Error

A

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Q. How do you declare a variable in Swift that must always hold a value (non-optional)?

  • (A) let name: String?
  • (B) var name: String
  • (C) let name: Optional<String>
  • (D) var name: String?

A

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Q. Which of the following methods appends a new element to a Swift array?

  • (A) add()
  • (B) insert()
  • (C) append()
  • (D) push()

A

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Q. Which keyword is used to define a protocol in Swift?

  • (A) interface
  • (B) protocol
  • (C) abstract
  • (D) delegate

A

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Q. What is the correct way to unwrap an optional using `guard`?

  • (A) guard let value = optionalValue else { return }
  • (B) guard value = optionalValue ? else { return }
  • (C) guard optionalValue != nil else { return }
  • (D) if value = optionalValue else { return }

A

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Q. Which of these is a value type in Swift?

  • (A) Class
  • (B) Struct
  • (C) Function
  • (D) Protocol

A

Admin • 802.91K Points
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Q. What will the following code output?

Code: 
let str = "Swift"
print(str.count)
  • (A) 4
  • (B) 5
  • (C) 6
  • (D) Error

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