Python Programming - Classes

Exercise : Classes - General Questions
  • Classes - General Questions
36.
Consider the following Python code:
class Shape:
    def __init__(self, name):
        self.name = name

    def display_info(self):
        print(f"I am a {self.name}")

class Square(Shape):
    def __init__(self, name, side_length):
        super().__init__(name)
        self.side_length = side_length

    def display_info(self):
        super().display_info()
        print(f"My side length is {self.side_length}")

# Create an instance of the Square class
my_square = Square("Square", 4)

# Call the display_info method
my_square.display_info()
What will be the output of the code?
I am a Square \n My side length is 4
My side length is 4 \n I am a Square
I am a Square
My side length is 4
Answer: Option
Explanation:
The code creates an instance of the `Square` class, which overrides the `display_info` method. The output includes messages from both the superclass (`Shape`) and the subclass (`Square`).

37.
Consider the following Python code:
class Vehicle:
    def __init__(self, brand):
        self.brand = brand

    def start_engine(self):
        print(f"The {self.brand} engine is starting")

class ElectricCar(Vehicle):
    def __init__(self, brand, battery_capacity):
        super().__init__(brand)
        self.battery_capacity = battery_capacity

    def start_engine(self):
        print(f"The electric car with {self.battery_capacity} kWh battery is starting")

# Create an instance of the ElectricCar class
my_electric_car = ElectricCar("Tesla", 75)

# Call the start_engine method
my_electric_car.start_engine()
What will be the output of the code?
The electric car with 75 kWh battery is starting
The Tesla engine is starting
The electric car is starting
The Tesla with 75 kWh battery engine is starting
Answer: Option
Explanation:
The code creates an instance of the `ElectricCar` class, which overrides the `start_engine` method. The output reflects the overridden method in the subclass.

38.
Consider the following Python code:
class Person:
    def __init__(self, name, age):
        self.name = name
        self.age = age

class Student(Person):
    def __init__(self, name, age, student_id):
        super().__init__(name, age)
        self.student_id = student_id

# Create an instance of the Student class
my_student = Student("Alice", 20, "S12345")

# Access and print attributes
print(my_student.name)
print(my_student.age)
print(my_student.student_id)
What will be the output of the code?
Alice \n 20 \n S12345
S12345 \n Alice \n 20
Alice \n S12345 \n 20
20 \n Alice \n S12345
Answer: Option
Explanation:
The code creates an instance of the `Student` class and prints the values of its attributes (`name`, `age`, `student_id`).

39.
Consider the following Python code:
class Animal:
    def __init__(self, species):
        self.species = species

class Bird(Animal):
    def __init__(self, species, wingspan):
        super().__init__(species)
        self.wingspan = wingspan

# Create an instance of the Bird class
my_bird = Bird("Eagle", 2.5)

# Access and print attributes
print(my_bird.species)
print(my_bird.wingspan)
What will be the output of the code?
Eagle \n 2.5
2.5 \n Eagle
Eagle
2.5
Answer: Option
Explanation:
The code creates an instance of the `Bird` class and prints the values of its attributes (`species`, `wingspan`).

40.
Consider the following Python code:
class CoffeeShop:
    def __init__(self, name):
        self.name = name

class EspressoBar(CoffeeShop):
    def __init__(self, name, serves_alcohol):
        super().__init__(name)
        self.serves_alcohol = serves_alcohol

# Create an instance of the EspressoBar class
my_espresso_bar = EspressoBar("Java Junction", False)

# Access and print attributes
print(my_espresso_bar.name)
print(my_espresso_bar.serves_alcohol)
What will be the output of the code?
Java Junction \n False
False \n Java Junction
Java Junction
False
Answer: Option
Explanation:
The code creates an instance of the `EspressoBar` class and prints the values of its attributes (`name`, `serves_alcohol`).