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Python OOP Exercise Questions

Last Updated : 22 Sep, 2025
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This collection of Python OOPs coding practice problems covers everything from defining classes and objects to solving advanced challenges like implementing design patterns and creating custom data structures. Perfect for beginners and seasoned programmers looking to deepen their understanding of OOP in Python!

Example Programs

Exercise 1: Create a class Greeter with a method greet(name) that prints a greeting for the provided name.

Python 
class Greeter:
    def greet(self, name):
        print(f"Hello, {name}!")

# Example usage:
g = Greeter()
g.greet("Gabriel")

Output
Hello, Gabriel!

Exercise 2: Develop a class Calculator with methods to add and subtract two numbers.

Python 
class Calculator:
    def add(self, a, b):
        return a + b

    def subtract(self, a, b):
        return a - b

# Testing the calculator
calc = Calculator()
print("Sum:", calc.add(5, 3))
print("Difference:", calc.subtract(5, 3))

Output
Sum: 8
Difference: 2

Exercise 3: Build a class Employee with multiple constructors that can initialize an employee object in different ways.

Python 
class Employee:
    def __init__(self, name, id=None, department=None):
        self.name = name
        self.id = id
        self.department = department

    def display_details(self):
        print(f"Name: {self.name}")
        if self.id:
            print(f"ID: {self.id}")
        if self.department:
            print(f"Department: {self.department}")

# Examples
emp1 = Employee("John")
emp1.display_details()

emp2 = Employee("Doe", 101)
emp2.display_details()

emp3 = Employee("Jane", 102, "HR")
emp3.display_details()

Output
Name: John
Name: Doe
ID: 101
Name: Jane
ID: 102
Department: HR

Exercise 4: Design a class SeriesCalculator that calculates the sum of an arithmetic series.

Python 
class SeriesCalculator:
    def calculate_sum(self, n, a=1, d=2):
        # Sum of the first n terms of an arithmetic series
        return n * (2 * a + (n - 1) * d) // 2

# Test the calculator
sc = SeriesCalculator()
print("Sum of series:", sc.calculate_sum(5))

Output
Sum of series: 25

Exercise 5: Create a class MaxFinder that identifies the largest number in a list.

Python 
class MaxFinder:
    def __init__(self, numbers):
        self.numbers = numbers

    def find_max(self):
        if not self.numbers:
            return "List is empty"
        return max(self.numbers)

# Example
finder = MaxFinder([1, 3, 2, 5, 4])
print("The largest number is:", finder.find_max())

Output
The largest number is: 5

Practice Problems

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anuragtriarna
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