Ruby MCQs with answers Page - 10

Dear candidates you will find MCQ questions of Ruby here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.
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Q. In Ruby, Array index -1 represent ______.

  • (A) First Element
  • (B) Last element
  • (C) Middle element
  • (D) Reverse the array
💬 Discuss
✅ Correct Answer: (B) Last element
Explanation: A negative index is assumed relative to the end of the array --- that is, an index of -1 indicates the last element of the array, -2 is the next to last element in the array, and so on.

Published by Yami Thakur ⭐ 10.63K Points at 21-Jul-2023 06:47 am in Ruby

Q. Which of the following is correct syntax to create an array in ruby?

  • (A) names = Array.new
  • (B) names = Array.new(20)
  • (C) Both A and B
  • (D) None of the above
💬 Discuss
✅ Correct Answer: (C) Both A and B
Explanation: We can create an array using both option A and option B.

Published by Yami Thakur ⭐ 10.63K Points at 21-Jul-2023 06:47 am in Ruby

Q. What will be the output of the given ruby code?

Code: 
digits = Array(0...9)
puts #{digits}
  • (A) [0, 1, 2, 3, 4, 5, 6, 7, 8]
  • (B) [0, 1, 2, 3, 4, 5, 6, 7, 8]
  • (C) [0, 1, 2, 3, 4, 5, 6, 7, 8,9]
  • (D) [1, 2, 3, 4, 5, 6, 7, 8]
💬 Discuss
✅ Correct Answer: (B) [0, 1, 2, 3, 4, 5, 6, 7, 8]
Explanation: This will produce the following result : [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

Published by Yami Thakur ⭐ 10.63K Points at 21-Jul-2023 06:48 am in Ruby

Q. What will be the output of the given ruby code?

Code: 
digits = Array(0..9)
num = digits.at(6)
puts #{num}
  • (A) 5
  • (B) 6
  • (C) 7
  • (D) 8
💬 Discuss
✅ Correct Answer: (B) 6
Explanation: This will produce the following result : 6

Published by Yami Thakur ⭐ 10.63K Points at 21-Jul-2023 06:49 am in Ruby

Q. What will be the output of the given ruby code?

  • (A) ABC
  • (B) abc
  • (C) BCD
  • (D) bcd
💬 Discuss
✅ Correct Answer: (A) ABC
Explanation: This will produce the following result : ABC

Published by Yami Thakur ⭐ 10.63K Points at 21-Jul-2023 06:49 am in Ruby

Q. What will be the output of the given ruby code?

Code: 
a = [ a, b, c ] puts a.pack(a3a3a3)
  • (A) ABC
  • (B) abc
  • (C) BCD
  • (D) bcd
💬 Discuss
✅ Correct Answer: (B) abc
Explanation: This will produce the following result : abc

Published by Yami Thakur ⭐ 10.63K Points at 21-Jul-2023 06:50 am in Ruby

Q. What will be the output of the given ruby code?

Code: 
arr = [1, 2, 3, 4]
print arr
  • (A) [1, 2, 3, 4]
  • (B) 1234
  • (C) error
  • (D) Infinite Loop
💬 Discuss
✅ Correct Answer: (A) [1, 2, 3, 4]
Explanation: A variable arr is declared and [1, 2, 3, 4] is stored in that variable.

Published by Yami Thakur ⭐ 10.63K Points at 21-Jul-2023 06:51 am in Ruby

Q. What will be the output of the given ruby code?

Code: 
array = [100, 200, 300, 400, 500]
print array[4]
  • (A) [100, 200, 300, 400, 500]
  • (B) 300
  • (C) 400
  • (D) 500
💬 Discuss
✅ Correct Answer: (D) 500
Explanation: Array's index start from 0 so array[4] will give 500.

Published by Yami Thakur ⭐ 10.63K Points at 21-Jul-2023 06:52 am in Ruby

Q. What will be the output of the given ruby code?

Code: 
string_array = [a,e,i,o,u]
print string_array
  • (A) Error
  • (B) ["a","e","i","o","u"]
  • (C) aeiou
  • (D) Infinite Loop
💬 Discuss
✅ Correct Answer: (B) ["a","e","i","o","u"]
Explanation: The array is a string array.

Published by Yami Thakur ⭐ 10.63K Points at 21-Jul-2023 06:52 am in Ruby

Q. What will be the output of the given ruby code?

Code: 
string_array = [a,e,i,o,u]
print string_array[3]
  • (A) ["a","e","i","o","u"]
  • (B) e
  • (C) i
  • (D) o
💬 Discuss
✅ Correct Answer: (D) o
Explanation: The array is a string array and the index is 3 so 'o' will be the output.

Published by Yami Thakur ⭐ 10.63K Points at 21-Jul-2023 06:53 am in Ruby

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