Ruby MCQ On Array

This section focuses on "Array" in Ruby. These Multiple Choice Questions (MCQ) should be practiced to improve the Ruby skills required for various interviews (campus interviews, walk-in interviews, company interviews), placements, entrance exams and other competitive examinations.

1. Ruby arrays are ____________.

A. unordered
B. ordered
C. Both A and B
D. None of the above

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2. Array indexing in ruby starts at_________.

A. -1
B. 1
C. 0
D. Random number

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3. 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

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4. What will be the output of the given 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]

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5. What will be the output of the given code?

n = [ 65, 66, 67 ] puts n.pack(ccc)

A. ABC
B. abc
C. BCD
D. bcd

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6. What will be the output of the given code?

arr = [1, 2, 3, 4]
print arr

A. [1, 2, 3, 4]
B. 1234
C. error
D. Infinite Loop

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7. What will be the output of the given code?

string_array = [a,e,i,o,u]
print string_array

A. Error
B. ["a","e","i","o","u"]
C. aeiou
D. Infinite Loop

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8. What will be the output of the given code?

arr = [[0,0,0,0],[0,0,0,0],[0,0,0,0],[0,0,0,0]]
print arr

A. [[0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0]].
B. [0, 0, 0, 0][0, 0, 0, 0].
C. [0, 0, 0, 0].
D. error

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9. What is the output of the given code?

array = [100, 200, 300, 400, 500]
print array[5]

A. 500
B. Syntax Error
C. Nil
D. Name Error

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10. What is the output of the given code?

array1 = [[1,2,3,4],[0,0,0,0]]
array2 = [[1,2,3,4],[0,0,0,0]]
print array1-array2

A. [[1, 2, 3, 4], [0, 0, 0, 0]]
B. [[1, 2, 3, 4], [0, 0, 0, 0], [1, 2, 3, 4], [0, 0, 0, 0]]
C. []
D. Nil

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