Swift (iOs) MCQs with answers Page - 20

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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Q. Which method is used to convert an array into a string?

  • (A) join()
  • (B) joined()
  • (C) concat()
  • (D) combine()

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Q. Which of these types is a reference type?

  • (A) Struct
  • (B) Tuple
  • (C) Enum
  • (D) Class

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Q. Which keyword is used to define an initializer?

  • (A) init
  • (B) constructor
  • (C) initialize
  • (D) create

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Q. Which Swift keyword is used to inherit from another class?

  • (A) :
  • (B) inherits
  • (C) extends
  • (D) ->

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Q. What will this code output?

Code: 
let flag = true
print(!flag)
  • (A) true
  • (B) false
  • (C) nil
  • (D) Error

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Q. Which keyword is used to mark a class available only for subclassing within the module?

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

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Q. Which function creates a random integer within a range?

  • (A) random()
  • (B) Int.random(in: 1...10)
  • (C) randInt(1, 10)
  • (D) generate()

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Q. Which Swift structure is best suited for modeling immutable data?

  • (A) Class
  • (B) Enum
  • (C) Struct
  • (D) AnyObject

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