[Solved] Consider this Ruby code:class Parent def process(data) data.map { |x| x * 2 } end end class Child What is the output? | Ruby

Ruby - Inheritance

Consider this Ruby code:

class Parent
  def process(data)
    data.map { |x| x * 2 }
  end
end

class Child < Parent
  def process(data)
    super(data.select { |x| x.even? })
  end
end

p Child.new.process([1,2,3,4])

What is the output?

A[4, 8]

B[2, 4, 6, 8]

C[1, 3]

DError: wrong number of arguments

Step-by-Step Solution

Solution:

Step 1: Analyze Child's process method
Child filters input array to only even numbers: [2,4].
Step 2: Call Parent's process with filtered data
Parent doubles each element: [2*2, 4*2] = [4, 8].
Final Answer:
[4, 8] -> Option A
Quick Check:
super called with filtered data returns doubled even numbers [OK]

Quick Trick: super can be called with modified arguments like filtered arrays [OK]

Common Mistakes:

Assuming original array is processed
Confusing map and select results
Expecting error due to argument passing

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More Ruby Quizzes

Consider this Ruby code:

Step 1: Analyze Child's process method

Step 2: Call Parent's process with filtered data

Final Answer:

Quick Check:

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