[Solved] What will this Ruby code print?module A def hello "Hello from A" end end class B include A def hello "Hello from B" end end puts B.new.hello | Ruby

Ruby - Modules and Mixins

What will this Ruby code print?

module A
  def hello
    "Hello from A"
  end
end

class B
  include A
  def hello
    "Hello from B"
  end
end

puts B.new.hello

ANoMethodError

BHello from A

CHello from B

Dnil

Step-by-Step Solution

Solution:

Step 1: Understand method lookup with include
Class B includes module A but also defines its own hello method, which overrides the module's method.
Step 2: Calling hello on B instance
B.new.hello calls B's own method, returning "Hello from B".
Final Answer:
Hello from B -> Option C
Quick Check:
Class method overrides included module method [OK]

Quick Trick: Class methods override included module methods [OK]

Common Mistakes:

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