[Solved] Given this code, what will be printed?class A def self.inherited(subclass) puts "Inherited by #{subclass}" end end class B < A; end class C < B; end | Ruby

Ruby - Advanced Metaprogramming

Given this code, what will be printed?

class A
  def self.inherited(subclass)
    puts "Inherited by #{subclass}"
  end
end

class B < A; end
class C < B; end

AInherited by B

BInherited by B Inherited by C

CInherited by C

DNo output

Step-by-Step Solution

Solution:

Step 1: Identify which class defines inherited
Only class A defines inherited.
Step 2: Trace subclassing calls
When B inherits from A, A.inherited(B) runs and prints "Inherited by B". When C inherits from B, B does not define inherited, so no print occurs.
Final Answer:
Inherited by B -> Option A
Quick Check:
Hook runs only on direct subclass of A [OK]

Quick Trick: Hook runs only on direct subclasses of defining class [OK]

Common Mistakes:

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