Given two modules Walk and Talk with methods walk and speak respectively, how can you create a class Person that uses both modules as mixins and calls both methods on an instance?
Choose the correct code snippet.
Aclass Person
extend Walk
extend Talk
end
p = Person.new
puts p.walk
puts p.speak
Bclass Person
include Walk Talk
end
p = Person.new
puts p.walk
puts p.speak
Cclass Person
include Walk
include Talk
end
p = Person.new
puts p.walk
puts p.speak
Dclass Person
use Walk
use Talk
end
p = Person.new
puts p.walk
puts p.speak
Step-by-Step Solution
Solution:
Step 1: Understand including multiple modules
You can include multiple modules by calling include multiple times inside the class.
Step 2: Verify method calls on instance
Including modules adds their methods as instance methods, so p.walk and p.speak work.
Final Answer:
class Person
include Walk
include Talk
end
p = Person.new
puts p.walk
puts p.speak -> Option C
Quick Check:
Include modules separately for instance methods [OK]
Quick Trick:Include each module separately for instance methods [OK]
Common Mistakes:
Using extend instead of include for instance methods
Trying to include multiple modules in one line
Using non-existent keyword 'use'
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