What is the output of the following Ruby code?

medium📝 Predict Output Q13 of 15

Ruby - Arrays

arr = [10, 20, 30, 40, 50]
puts arr[2]
puts arr.first
puts arr[-2]

A40 10 30

B30 10 40

C30 50 40

D20 10 50

Step-by-Step Solution

Solution:

Step 1: Evaluate arr[2]
Index 2 is the third element, which is 30.
Step 2: Evaluate arr.first and arr[-2]
arr.first is 10 (first element), arr[-2] is second last element, 40.
Final Answer:
30 10 40 -> Option B
Quick Check:
Index 2 = 30, first = 10, second last = 40 [OK]

Quick Trick: Remember index starts at 0; negative counts from end [OK]

Common Mistakes:

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