[Solved] Identify the error in this code snippet: class Cat end kitty = Cat.new kitty.class_eval { def meow; 'Meow!'; end } puts kitty.meow | Ruby

Ruby - Advanced Metaprogramming

Identify the error in this code snippet:

class Cat
end

kitty = Cat.new
kitty.class_eval { def meow; 'Meow!'; end }
puts kitty.meow

ANo error; outputs 'Meow!'

BNoMethodError because class_eval is called on instance

CSyntaxError due to missing block

DRuntimeError because method already exists

Step-by-Step Solution

Solution:

Step 1: Check receiver of class_eval
class_eval is a method of Class, not of instances; calling it on an instance raises NoMethodError.
Step 2: Verify execution
Since kitty is an instance, kitty.class_eval raises NoMethodError; thus, puts kitty.meow is not reached.
Final Answer:
NoMethodError because class_eval is called on instance -> Option B
Quick Check:
class_eval is a Class method, not instance method [OK]

Quick Trick: class_eval is called on classes, not instances [OK]

Common Mistakes:

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