Ruby MCQs with answers Page - 105

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

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Q. Which keyword is used to raise an exception in Ruby?

  • (A) throw
  • (B) raise
  • (C) catch
  • (D) error

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Q. Which keyword is used to exit a loop in Ruby?

  • (A) break
  • (B) stop
  • (C) exit
  • (D) end

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Q. Which method converts a string to uppercase in Ruby?

  • (A) upcase
  • (B) uppercase
  • (C) toUpperCase
  • (D) capitalize

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Q. How do you define a constant in Ruby?

  • (A) Starting with uppercase letter
  • (B) Starting with lowercase letter
  • (C) Starting with underscore
  • (D) Starting with $ sign

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Q. What is the output of 'nil.nil?' in Ruby?

  • (A) true
  • (B) false
  • (C) nil
  • (D) error

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Q. Which method is used to check if an array includes a specific element?

  • (A) include?
  • (B) has?
  • (C) contains?
  • (D) exists?

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Q. What does the 'each' method do in Ruby?

  • (A) Iterates over elements
  • (B) Sorts the elements
  • (C) Filters the elements
  • (D) Deletes elements

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Q. Which of these is the correct way to define a symbol-to-string hash key?

  • (A) { 'key' => 'value' }
  • (B) { key: 'value' }
  • (C) { :key => 'value' }
  • (D) Both option2 and option3

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Q. What is the result of 10 / 3 in Ruby?

  • (A) 3
  • (B) 3.33
  • (C) 3.0
  • (D) Error

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Q. Which method converts a symbol to a string in Ruby?

  • (A) to_s
  • (B) to_str
  • (C) to_sym
  • (D) to_string

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