Modules and Mixins in Ruby MCQ question and answer with solution

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What is the significance 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

No explanation is given for this question. Let's Discuss on Board

What is the main advantage of using polymorphism in Ruby?

A) It allows for faster code execution B) It allows for easier code debugging C) It allows for more flexible and reusable code D) It allows for better code organization

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Answer & Solution

Answer: Option C

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What is the purpose of the extend keyword in Ruby?

A) Initializes a new instance B) Adds methods from a module as class methods C) Calls a superclass method D) None of the above

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Answer & Solution

Answer: Option B

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What does the term "inheritance" refer to in Ruby?

A) A mechanism by which a class can create multiple instances of another class B) A mechanism by which a class can hide implementation details from another class C) A mechanism by which a class can inherit properties and behaviors from another class D) A mechanism by which a class can override methods from another class

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Answer & Solution

Answer: Option C

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What is the purpose of the include keyword in Ruby classes?

A) To inherit from another class B) To define a new method C) To create a new instance D) To mix in methods from a module into a class

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Answer & Solution

Answer: Option D

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In Ruby, what is the purpose of the super keyword?

A) Calls the same method in the superclass B) Calls the same method in the subclass C) Returns the superclass D) Initializes a superclass object

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Answer & Solution

Answer: Option A

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What is the main purpose of a constructor in a Ruby class?

A) To define getter and setter methods B) To create new instances of the class C) To define class methods D) To initialize instance variables

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Answer & Solution

Answer: Option D

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In Ruby, what is encapsulation?

A) Hiding data within a class B) Inheriting properties and behaviors C) Binding data with methods that operate on that data D) Converting data types

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Answer & Solution

Answer: Option C

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What is the primary goal of using polymorphism in Ruby?

A) To simplify the syntax of a program B) To allow for more flexible and reusable code C) To enhance code modularity D) None of the above

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Answer & Solution

Answer: Option B

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Which keyword is used to refer to the current instance of a class in Ruby?

A) object B) instance C) self D) this

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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