Ruby MCQ Questions with answers and solutions Page 112

Q. Which method returns the first element of an array in Ruby?

(A) first
(B) head
(C) start
(D) begin

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✅ Correct Answer: (A) first

Explanation: The first method returns the first element of an array.

Published by Rati Dubey ⭐ 9.05K Points at 09-Jun-2025 07:17 am in Ruby

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

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

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✅ Correct Answer: (B) raise

Explanation: The raise keyword is used to throw an exception.

Published by Rati Dubey ⭐ 9.05K Points at 09-Jun-2025 07:17 am in Ruby

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

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

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✅ Correct Answer: (A) break

Explanation: The break keyword terminates a loop.

Published by Rati Dubey ⭐ 9.05K Points at 09-Jun-2025 07:17 am in Ruby

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

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

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✅ Correct Answer: (A) upcase

Explanation: The upcase method converts a string to uppercase.

Published by Rati Dubey ⭐ 9.05K Points at 09-Jun-2025 07:17 am in Ruby

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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✅ Correct Answer: (A) Starting with uppercase letter

Explanation: Constants begin with an uppercase letter in Ruby.

Published by Rati Dubey ⭐ 9.05K Points at 09-Jun-2025 07:17 am in Ruby

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

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

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✅ Correct Answer: (A) true

Explanation: Calling nil? on nil returns true.

Published by Rati Dubey ⭐ 9.05K Points at 09-Jun-2025 07:17 am in Ruby

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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✅ Correct Answer: (A) include?

Explanation: The include? method returns true if the element exists in the array.

Published by Rati Dubey ⭐ 9.05K Points at 09-Jun-2025 07:17 am in Ruby

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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✅ Correct Answer: (A) Iterates over elements

Explanation: The each method iterates over each element in a collection.

Published by Rati Dubey ⭐ 9.05K Points at 09-Jun-2025 07:17 am in Ruby

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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✅ Correct Answer: (D) Both option2 and option3

Explanation: Ruby supports both new and old syntax for symbol keys.

Published by Rati Dubey ⭐ 9.05K Points at 09-Jun-2025 07:17 am in Ruby

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

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

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✅ Correct Answer: (A) 3

Explanation: Integer division truncates decimal part in Ruby.

Published by Rati Dubey ⭐ 9.05K Points at 09-Jun-2025 07:17 am in Ruby

Ruby MCQs with answers Page - 112

Q. Which method returns the first element of an array in Ruby?

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

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

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

Q. How do you define a constant in Ruby?

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

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

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

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

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

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