Practice Top 30 Python Programming Questions on Object Oriented Programming

Practice Top 30 Python Programming Questions on Object Oriented Programming

Q1. Create a class Person with an attribute name. Instantiate it with the name "Alice" and display the name.  
  - Input: None  
  - Expected Output: "Alice"

Q2. Create a class Calculator with a method add(a, b) that returns the sum of two numbers. Use it to calculate 2 + 3.  
  - Input: None  
  - Expected Output: 5

Q3. Create a class Student with attributes name and age. Modify the age attribute after object creation.  
  - Input: name="John", age=20, then age=21  
  - Expected Output: 21

Q4. Create a class Car with an attribute brand that defaults to "Toyota". Create an object and display its brand.  
  - Input: None  
  - Expected Output: "Toyota"

Q5. Create a class Rectangle with methods area(length, width) and perimeter(length, width). Call both methods.  
  - Input: length=4, width=3  
  - Expected Output: Area: 12, Perimeter: 14

Q6. Create a class Circle with a constructor to initialize the radius and a method area() to calculate the area.  
  - Input: radius=5  
  - Expected Output: 78.5

Q7. Create a class Demo with a destructor that prints "Object destroyed" when an object is deleted.  
  - Input: Create and delete the object.  
  - Expected Output: "Object destroyed"

Q8. Create a class Employee with a constructor to initialize name and salary. Display both attributes.  
  - Input: name="Alice", salary=50000  
  - Expected Output: Name: Alice, Salary: 50000

Q9. Create a class Book with a default constructor that sets the title to "Unknown". Display the title.  
  - Input: None  
  - Expected Output: "Unknown"

Q10. Create a class Player with a parameterized constructor. If no name is passed, default to "Guest".  
   - Input: Name provided: "John", Name not provided: None  
   - Expected Output: "John", "Guest"

Q11. Create a class Animal with a method speak(). Inherit it in Dog and override the method to print "Bark!".  
   - Input: None  
   - Expected Output: "Bark!"

Q12. Use super() in the child class to call the speak() method of the parent Animal class.  
   - Input: None  
   - Expected Output: "Animal sound"

Q13. Create three classes A, B, and C where B inherits A and C inherits B. Call a method from A using an object of C.  
   - Input: None  
   - Expected Output: "Method from class A"

Q14. Create a base class Shape and derive Rectangle and Triangle. Add unique methods in both derived classes.  
   - Input: None  
   - Expected Output: Rectangle and Triangle methods executed.

Q15. Create a class Vehicle with a method speed(). Override it in Car to print "Car speed is 100 km/h".  
   - Input: None  
   - Expected Output: "Car speed is 100 km/h"

Q16. Write a program where the same function area() behaves differently in Circle and Rectangle.  
   - Input: Circle: radius=5, Rectangle: length=4, width=3  
   - Expected Output: Circle area: 78.5, Rectangle area: 12

Q17. Create a class Account with a private attribute _balance and a public method get_balance(). Access the balance through the method.  
   - Input: _balance=500  
   - Expected Output: 500

Q18. Write a function describe() that prints different messages for objects of Dog and Cat.  
   - Input: Object type: Dog, Cat  
   - Expected Output: "This is a Dog", "This is a Cat"

Q19. Write a program to demonstrate public, private, and protected attributes in a class.  
   - Input: None  
   - Expected Output: Access behavior for public, protected, and private attributes.

Q20. Create a class Person with attributes name and age. Use getter and setter methods to access and modify them.  
   - Input: name="Alice", age=25, then modify to age=26  
   - Expected Output: 26  

Q21. Create a class Person and override the __str__ method to return "Person: [Name]".  
   - Input: name="Alice"  
   - Expected Output: "Person: Alice"

Q22. Override the __repr__ method in a class Book to display "Book(title)".  
   - Input: title="Python"  
   - Expected Output: "Book('Python')"

Q23. Create a class Number and override the __add__ method to add two objects.  
   - Input: Number(5) + Number(10)  
   - Expected Output: 15

Q24. Create a class Collection and define a __len__ method that returns the number of items.  
   - Input: Collection with 3 items  
   - Expected Output: 3

Q25. Create a class Point and override __eq__ to compare two points.  
   - Input: Point(2, 3) == Point(2, 3)  
   - Expected Output: True

Q26. Create a class Person with the attributes name and age. Instantiate the class with name="Tom" and age=30.  
   - Input: name="Tom", age=30  
   - Expected Output: "Tom, 30"

Q27. Create a class Greeting with a method greet(name="User") that prints "Hello, name". Call the method with and without an argument.  
   - Input: "Alice", None  
   - Expected Output: "Hello, Alice", "Hello, User"

Q28. Create a class Book with attributes title, author, and year. Instantiate the class with the values "Python Basics", "John", and 2021.  
   - Input: title="Python Basics", author="John", year=2021  
   - Expected Output: "Python Basics, John, 2021"

Q29. Create a class Math with a static method add(a, b) to add two numbers. Call the static method without creating an object.  
   - Input: add(3, 4)  
   - Expected Output: 7

Q30. Create a class Car with a class attribute wheels set to 4. Access the class attribute using the class name and object.  
   - Input: Car.wheels  
   - Expected Output: 4