Namespacing with modules in Ruby - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a module named MathTools.

Ruby

module [1]
  def self.square(x)
    x * x
  end
end

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ATools

BMathTools

CToolsMath

DMathTool

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase or incorrect module names.

Forgetting to capitalize module names.

The module name should be MathTools to match the intended namespace.

2fill in blank

medium

Complete the code to call the square method inside the MathTools module.

Ruby

result = MathTools.[1](5)
puts result

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Asquare

Bsquare_root

Csquared

Dpower

Attempts:

3 left

💡 Hint

Common Mistakes

Using method names that do not exist in the module.

Calling methods without the module prefix.

The method defined in the module is named square, so we call MathTools.square(5).

3fill in blank

hard

Fix the error in the code by completing the module namespace correctly.

Ruby

module Geometry
  module [1]
    def self.area(radius)
      3.14 * radius * radius
    end
  end
end

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AShape

Bshapes

CShapes

Dshape

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase module names.

Using singular form when plural is more appropriate.

Module names should be capitalized and plural if representing a collection, so Shapes is correct.

4fill in blank

hard

Fill both blanks to define a nested module and call its method correctly.

Ruby

module [1]
  module Calculator
    def self.add(a, b)
      a + b
    end
  end
end

result = [2]::Calculator.add(3, 4)
puts result

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AMathTools

CToolsMath

Attempts:

3 left

💡 Hint

Common Mistakes

Using different module names in definition and call.

Using dot notation instead of scope resolution operator.

The outer module is MathTools, and to call the nested method, use MathTools::Calculator.add.

5fill in blank

hard

Fill all three blanks to create a nested module with a method and call it properly.

Ruby

module [1]
  module [2]
    def self.greet(name)
      "Hello, #{name}!"
    end
  end
end

message = [3]::Greeter.greet("Alice")
puts message

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AMyApp

BGreeter

DYourApp

Attempts:

3 left

💡 Hint

Common Mistakes

Mismatching module names between definition and call.

Using lowercase module names.

The outer module is MyApp, the nested module is Greeter, and the call uses MyApp::Greeter.greet.