[Solved] Which of the following is the correct way to define an inherited hook in a Ruby class? — Ans: def self.inherited(subclass); puts "New subclass created"; end | Ruby

Ruby - Advanced Metaprogramming

Which of the following is the correct way to define an inherited hook in a Ruby class?

Adef self.inherited; puts "New subclass created"; end

Bdef inherited(self); puts "New subclass created"; end

Cdef inherited(subclass); puts "New subclass created"; end

Ddef self.inherited(subclass); puts "New subclass created"; end

Step-by-Step Solution

Solution:

Step 1: Recognize the method signature
The inherited hook must be defined as a class method, so it needs self.inherited and takes one argument: the subclass.
Step 2: Check method parameters and syntax
def self.inherited(subclass); puts "New subclass created"; end correctly defines the class method with the subclass parameter. Incorrect versions lack self. (instance method), omit the subclass parameter, or use wrong parameters like self.
Final Answer:
def self.inherited(subclass); puts "New subclass created"; end -> Option D
Quick Check:
Class method with subclass param = def self.inherited(subclass); puts "New subclass created"; end [OK]

Quick Trick: Inherited hook is a class method with subclass param [OK]

Common Mistakes:

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Which of the following is the correct way to define an inherited hook in a Ruby class?