[Solved] Identify the problem in this Ruby code snippet:module M def hello 'Hi' end end class A include M end class B | Ruby

Ruby - Inheritance

Identify the problem in this Ruby code snippet:

module M
  def hello
    'Hi'
  end
end

class A
  include M
end

class B < A
  include M
end

AClass B cannot inherit from A

BRedundant module inclusion in subclass

CSyntax error in module declaration

DModule M cannot be included twice

Step-by-Step Solution

Solution:

Step 1: Understand module inclusion inheritance
When a module is included in a parent class, subclasses inherit its methods automatically.
Step 2: Identify redundancy
Including the same module again in subclass is unnecessary but not an error.
Final Answer:
Redundant module inclusion in subclass -> Option B
Quick Check:
Module inclusion in subclass = Redundant but allowed [OK]

Quick Trick: Modules included in parent are inherited by subclasses [OK]

Common Mistakes:

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