Inheritance And Polymorphism In Ruby MCQs with Explanations
Practice high-yield Programming & Software Development MCQs on Inheritance And Polymorphism In Ruby with worked academic solutions for FPSC, PPSC, NTS, NITB, PTS.
Questions
31
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FPSC, PPSC, NTS...
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38 mins
Exam-Level FPSC PPSC NTS NITB PTS
Verified for Commission Syllabus • Oct 14, 2026
31
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Question 1 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
What does inheritance allow in OOP?
Correct Answer: Option D — A class to inherit properties and behaviors from another class
Detailed Academic Explanation:
A class to inherit properties and behaviors from another class is the correct answer to “What does inheritance allow in OOP”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
Question 2 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
What is polymorphism in OOP?
Correct Answer: Option C — The ability for objects of different classes to be treated as objects of a common superclass
Detailed Academic Explanation:
The ability for objects of different classes to be treated as objects of a common superclass is the correct answer to “What is polymorphism in OOP”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
Question 3 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
What is the purpose of the super keyword in Ruby OOP?
Correct Answer: Option B — Calls the same method in the superclass
Detailed Academic Explanation:
Calls the same method in the superclass is the correct answer to “What is the purpose of the super keyword in Ruby OOP”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
Question 4 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
What is the main principle behind object-oriented programming?
Correct Answer: Option C — Objects
Detailed Academic Explanation:
Objects is the correct answer to “What is the main principle behind object-oriented programming”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
Question 5 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
Which concept in OOP promotes reusability and reduces redundancy in code?
Correct Answer: Option D — Inheritance
Detailed Academic Explanation:
Inheritance is the correct answer to “Which concept in OOP promotes reusability and reduces redundancy in code”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
Question 6 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
What is the purpose of abstraction in OOP?
Correct Answer: Option A — To hide the complex implementation details and only show the necessary features
Detailed Academic Explanation:
To hide the complex implementation details and only show the necessary features is the correct answer to “What is the purpose of abstraction in OOP”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
Question 7 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
What does the term "class" refer to in OOP?
Correct Answer: Option D — A blueprint for creating objects
Detailed Academic Explanation:
A blueprint for creating objects is the correct answer to “What does the term "class" refer to in OOP”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
Question 8 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
What is the significance of the initialize method in Ruby classes?
Correct Answer: Option C — It is automatically called when a new object is created and allows initialization of instance variables
Detailed Academic Explanation:
It is automatically called when a new object is created and allows initialization of instance variables is the correct answer to “What is the significance of the initialize method in Ruby classes”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
Question 9 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
What does polymorphism allow in OOP?
Correct Answer: Option B — Objects of different classes to be treated as objects of a common superclass
Detailed Academic Explanation:
Objects of different classes to be treated as objects of a common superclass is the correct answer to “What does polymorphism allow in OOP”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
Question 10 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
What is the difference between attr_reader, attr_writer, and attr_accessor in Ruby?
Correct Answer: Option D — attr_reader defines only reader methods, attr_writer defines only writer methods, and attr_accessor defines both
Detailed Academic Explanation:
attr_reader defines only reader methods, attr_writer defines only writer methods, and attr_accessor defines both is the correct answer to “What is the difference between attr_reader, attr_writer, and attr_accessor in Ruby”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
Question 11 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
What is the main advantage of using OOP principles in programming?
Correct Answer: Option A — Modularity and reusability
Detailed Academic Explanation:
Modularity and reusability is the correct answer to “What is the main advantage of using OOP principles in programming”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
Question 12 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
What is the purpose of the include keyword in Ruby classes?
Correct Answer: Option D — To mix in methods from a module into a class
Detailed Academic Explanation:
To mix in methods from a module into a class is the correct answer to “What is the purpose of the include keyword in Ruby classes”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
Question 13 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
What does the term "object" refer to in OOP?
Correct Answer: Option C — An instance of a class
Detailed Academic Explanation:
An instance of a class is the correct answer to “What does the term "object" refer to in OOP”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
Question 14 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
What is the purpose of inheritance in OOP?
Correct Answer: Option B — To allow a class to inherit properties and behaviors from another class
Detailed Academic Explanation:
To allow a class to inherit properties and behaviors from another class is the correct answer to “What is the purpose of inheritance in OOP”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
Question 15 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
Which OOP principle emphasizes the hiding of implementation details and showing only necessary features?
Correct Answer: Option C — Abstraction
Detailed Academic Explanation:
Abstraction is the correct answer to “Which OOP principle emphasizes the hiding of implementation details and showing only necessary features”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
Question 16 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
Which concept in OOP allows objects to exhibit multiple behaviors based on their types or class?
Correct Answer: Option D — Polymorphism
Detailed Academic Explanation:
Polymorphism is the correct answer to “Which concept in OOP allows objects to exhibit multiple behaviors based on their types or class”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
Question 17 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
Which OOP principle promotes reusability and reduces redundancy in code?
Correct Answer: Option A — Inheritance
Detailed Academic Explanation:
Inheritance is the correct answer to “Which OOP principle promotes reusability and reduces redundancy in code”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
Question 18 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
What does the attr_accessor method do in Ruby OOP?
Correct Answer: Option D — Creates both reader and writer methods for class attributes
Detailed Academic Explanation:
Creates both reader and writer methods for class attributes is the correct answer to “What does the attr_accessor method do in Ruby OOP”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
Question 19 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
What is the purpose of the self keyword in Ruby?
Correct Answer: Option C — Refers to the class itself
Detailed Academic Explanation:
Refers to the class itself is the correct answer to “What is the purpose of the self keyword in Ruby”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
Question 20 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
What is the significance of the attr_writer method in Ruby classes?
Correct Answer: Option B — Defines only writer methods for class attributes
Detailed Academic Explanation:
Defines only writer methods for class attributes is the correct answer to “What is the significance of the attr_writer method in Ruby classes”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
Question 21 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
What does the term "inheritance" mean in Object-Oriented Programming?
Correct Answer: Option C — A mechanism by which a class can inherit properties and behaviors from another class
Detailed Academic Explanation:
A mechanism by which a class can inherit properties and behaviors from another class is the correct answer to “What does the term "inheritance" mean in Object-Oriented Programming”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
Question 22 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
Which concept in Object-Oriented Programming allows objects of different classes to be treated as objects of a common superclass?
Correct Answer: Option D — Polymorphism
Detailed Academic Explanation:
Polymorphism is the correct answer to “Which concept in Object-Oriented Programming allows objects of different classes to be treated as objects of a common superclass”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
Question 23 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
What is the primary purpose of a constructor in a Ruby class?
Correct Answer: Option A — To initialize instance variables
Detailed Academic Explanation:
To initialize instance variables is the correct answer to “What is the primary purpose of a constructor in a Ruby class”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
Question 24 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
In Ruby, which keyword is used to define a private method?
Correct Answer: Option D — private
Detailed Academic Explanation:
private is the correct answer to “In Ruby, which keyword is used to define a private method”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
Question 25 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
What does the term "polymorphism" refer to in Object-Oriented Programming?
Correct Answer: Option B — The ability for objects of different classes to be treated as objects of a common superclass
Detailed Academic Explanation:
The ability for objects of different classes to be treated as objects of a common superclass is the correct answer to “What does the term "polymorphism" refer to in Object-Oriented Programming”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
Question 26 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
What is the purpose of the extend keyword in Ruby?
Correct Answer: Option C — Adds methods from a module as class methods
Detailed Academic Explanation:
Adds methods from a module as class methods is the correct answer to “What is the purpose of the extend keyword in Ruby”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
Question 27 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
What is the main purpose of using abstraction in Object-Oriented Programming?
Correct Answer: Option D — To hide the complex implementation details and only expose the necessary features
Detailed Academic Explanation:
To hide the complex implementation details and only expose the necessary features is the correct answer to “What is the main purpose of using abstraction in Object-Oriented Programming”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
Question 28 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
What is the significance of using the super keyword in a Ruby class?
Correct Answer: Option C — It calls the same method in the superclass
Detailed Academic Explanation:
It calls the same method in the superclass is the correct answer to “What is the significance of using the super keyword in a Ruby class”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
Question 29 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
Which of the following statements best describes the purpose of the attr_accessor method in Ruby classes?
Correct Answer: Option D — It defines both reader and writer methods for class attributes
Detailed Academic Explanation:
It defines both reader and writer methods for class attributes is the correct answer to “Which of the following statements best describes the purpose of the attr_accessor method in Ruby classes”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
Question 30 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
What is the main advantage of using Object-Oriented Programming (OOP) principles?
Correct Answer: Option A — Modularity and reusability
Detailed Academic Explanation:
Modularity and reusability is the correct answer to “What is the main advantage of using Object-Oriented Programming (OOP) principles”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
Question 31 of 31
★ FPSC
★ PPSC
★ FPSC
★ PPSC
What does the term "abstraction" mean in Object-Oriented Programming?
Correct Answer: Option D — It hides the complex implementation details and only shows the necessary features
Detailed Academic Explanation:
It hides the complex implementation details and only shows the necessary features is the correct answer to “What does the term "abstraction" mean in Object-Oriented Programming”. This question is standard in competitive examination syllabi for Inheritance And Polymorphism In Ruby.
💡Key Conceptual Anchor:Inheritance And Polymorphism In Ruby
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In competitive commission exams (FPSC, PPSC, KPPSC, SPSC, CSS, PMS), questions are frequently phrased with distractor options designed to catch rote learners. Whenever you answer an MCQ, read the Detailed Academic Explanation and Conceptual Anchor to understand why the remaining options are incorrect.