[Solved] What will be the output of this Ruby code?class CatchAll def method_missing(name, *args) "Called #{name} with #{args.join(', ')}" end end obj = CatchAll.new puts obj.hello('world') | Ruby

Ruby - Metaprogramming Fundamentals

What will be the output of this Ruby code?

class CatchAll
  def method_missing(name, *args)
    "Called #{name} with #{args.join(', ')}"
  end
end

obj = CatchAll.new
puts obj.hello('world')

Ahello

BCalled hello with world

CNoMethodError

DCalled method_missing with hello

Step-by-Step Solution

Solution:

Step 1: Understand method_missing behavior
The method_missing catches the call to hello which is undefined and returns a string with method name and arguments.
Step 2: Evaluate the output
Calling obj.hello('world') triggers method_missing with name :hello and args ['world'], so output is "Called hello with world".
Final Answer:
Called hello with world -> Option B
Quick Check:
method_missing output = Called hello with world [OK]

Quick Trick: method_missing returns string with method name and args [OK]

Common Mistakes:

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