Modules and Mixins in Ruby MCQ question and answer with solution

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What is the purpose of the attr_accessor method in Ruby classes?

A) Defines only a reader method for class attributes B) Defines only a writer method for class attributes C) Defines constructor methods for class attributes D) Defines both reader and writer methods for class attributes

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Answer & Solution

Answer: Option D

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What is the primary benefit of using inheritance in Ruby?

A) It promotes code reusability and reduces redundancy B) It improves code performance C) It simplifies the syntax of a program D) It enhances code modularity

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Answer & Solution

Answer: Option A

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What is the purpose of the initialize method in Ruby classes?

A) It defines instance methods B) It defines class methods C) It defines class variables D) It is automatically called when a new object is created and allows initialization of instance variables

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Answer & Solution

Answer: Option D

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What is the main advantage of using encapsulation in Ruby?

A) It exposes the internal state of an object and allows unrestricted access B) It allows for multiple classes to inherit from each other C) It hides the internal state of an object and restricts access to it D) It allows for objects of different classes to be treated as objects of a common superclass

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Answer & Solution

Answer: Option C

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What does the term "polymorphism" mean in Ruby?

A) The ability to restrict access to certain methods B) The ability for objects of different classes to be treated as objects of a common superclass C) The ability to create multiple instances of a class D) None of the above

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Answer & Solution

Answer: Option B

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What does the include keyword do in Ruby?

A) Creates a new instance B) Defines a new method C) Mixes in methods from a module into a class D) Inherits from another class

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Answer & Solution

Answer: Option C

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Modules and Mixins in Ruby MCQ question and answer with solution | Ruby Programming MCQs