The following Ruby code is intended to add 0 to the front of the array nums and then remove the last element. What is the error?

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Ruby - Arrays

The following Ruby code is intended to add 0 to the front of the array nums and then remove the last element. What is the error?

nums = [1, 2, 3]
nums.unshift(0)
nums.pop()

ANo error; code works correctly

Bpop() should be called before unshift()

Cunshift() does not add elements to array

Dpop() removes the first element, not the last

Step-by-Step Solution

Solution:

Step 1: Understand unshift(0) effect
This adds 0 to the front, changing [1, 2, 3] to [0, 1, 2, 3].
Step 2: Understand pop() effect
This removes the last element (3), resulting in [0, 1, 2].
Final Answer:
No error; code works correctly -> Option A
Quick Check:
unshift adds front, pop removes last = correct [OK]

Quick Trick: unshift adds front, pop removes last, order matters [OK]

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