Object Oriented Programming (OOP) Concepts in Ruby MCQ question and answer with solution

Object Oriented Programming (OOP) Concepts in Ruby MCQ question and answer with solution | Ruby Programming MCQs

Learn Object Oriented Programming (OOP) Concepts in Ruby MCQ Questions and answers with easy and logical explanations in Ruby Programming. Object Oriented Programming (OOP) Concepts in Ruby MCQ question provides all type of technical mcq questions which is important for technical exams, campus exams and other entrance examination.

What is a class in Ruby?

A) A blueprint for objects B) A variable holding multiple values C) A single data structure D) A method to define behavior

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Answer & Solution

Answer: Option A

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Which keyword is used to define a class in Ruby?

A) class B) def C) new D) object

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Answer & Solution

Answer: Option A

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What does the initialize method do in a Ruby class?

A) Initializes class variables B) Defines instance methods C) Defines class methods D) Initializes new objects

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Answer & Solution

Answer: Option D

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In Ruby, what is an object?

A) An instance of a class B) A variable C) A method D) A module

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Answer & Solution

Answer: Option A

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Which method is used to create a new instance of a class in Ruby?

A) new B) create C) instance D) initialize

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Answer: Option A

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

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

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Answer: Option A

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

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

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Answer: Option A

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What is the purpose of inheritance in Ruby classes?

A) To allow a class to inherit properties and behaviors from another class B) To allow multiple classes to inherit from each other C) To restrict access to certain methods D) To define private methods

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Answer: Option A

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What is encapsulation in Ruby classes?

A) The bundling of data with the methods that operate on that data B) The hiding of data within a class C) The inheritance of properties and behaviors D) The conversion of data types

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Answer & Solution

Answer: Option A

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Which method is called automatically when an object is created in Ruby?

A) initialize B) new C) create D) constructor

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Answer & Solution

Answer: Option A

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