Hackerrank - HackerRank Python Object-Oriented Programming Basics Questions and Answers

Question 1

Which of the following best describes the relationship between a class and an object in Python?

Accepted Answer

An object is a specific, concrete realization of a class.

Answer

A class is an instance of an object.

Answer

A class and an object are interchangeable terms for the same concept.

Answer

An object is a template used to create multiple classes.

Question 2

In a Python class, what is the primary role of the special method `__init__`?

Accepted Answer

To initialize the state of a newly created object with its starting attributes.

Answer

To define the string representation of an object for end-users.

Answer

To destroy an object and free up memory when it is no longer in use.

Answer

To create a new instance of the class before it is initialized.

Question 3

Analyze the following code. What principle of object-oriented programming does the `Penguin` class's `fly` method demonstrate?

Accepted Answer

Method Overriding

Answer

Encapsulation

Answer

Abstraction

Answer

Inheritance

Question 4

A developer wants to prevent accidental modification of a `_balance` attribute from outside the `Account` class. According to Python's conventions for encapsulation, which naming prefix should be used for the attribute?

Accepted Answer

__balance

Answer

balance_

Answer

_balance

Answer

BALANCE

Question 5

What will be the output of the following Python code snippet?

Accepted Answer

Canis familiaris, Canis familiaris

Answer

Canis lupus, Canis lupus

Answer

Canis lupus, Canis familiaris

Answer

Canis familiaris, Canis lupus

Question 6

Which object-oriented principle allows different objects to respond to the same method call in their own unique ways, enabling flexible and reusable code?

Accepted Answer

Polymorphism

Answer

Inheritance

Answer

Encapsulation

Answer

Composition