OOP – Inheritance (basic)

Name:

Date:

Class:

Quick Questions

Shade in the A or B circle for each question.

1. What is inheritance?

A A child class gets methods from a parent class

B Copying a file

2. class Dog(Animal): what is Animal?

A The parent (base) class

B The child class

3. What does super() do?

A Creates a new class

B Accesses the parent class

4. If Animal has speak(), does Dog get it?

A No must redefine

B Yes automatically through inheritance

5. Can Dog override Animal's speak()?

A Yes define speak() in Dog

B No parent methods are locked

Match the Pairs

Draw a line connecting each item on the left to its match on the right.

Left column		Right column
1class Dog(Animal)		AError: super() takes no arguments in Python 3
2super(Animal).__init__()		BOk: Calls the parent class constructor
3class Dog(Animal):		COutput: True
4super().__init__()		DOutput: True
5issubclass(bool, int)		EValid: Dog inherits from Animal
6isinstance(True, int)		FError: Missing colon at end of class definition

Definitions

Inheritance

Fill in the Blanks

Complete each line of code by filling in the missing parts.

class Dog(______): pass

class Dog(Animal): def ________(self, name, breed): _____().________(name)

class Dog(Animal): def speak(self): return self.name + ' says Woof!' # this _________ the parent

dog = Dog('Rex') print(__________(dog, Animal))

class Circle(Shape): def ________(self, color, radius): _____().________(color)

Spot the Error

Shade in the letter of the line that contains an error.

Question 1

A class Dog(Animal):

B def __init__(self, name, breed):

C self.name = name

D self.breed = breed

Question 2

A class Dog(Animal):

B def __init__(self, name, breed):

C super().__init__()

D self.breed = breed

Question 3

A class Dog extends Animal:

B def __init__(self, name):

C super().__init__(name)

D def bark(self):

E return 'Woof!'

Question 4

A class Dog(Animal):

B def __init__(self, name):

C super.__init__(name)

Question 5

A class Animal:

B def speak(self):

C return 'Sound'

E class Dog(Animal):

F def speak():

G return 'Woof'

Answer Key

OOP – Inheritance (basic)

Section A: Quick Questions

A — A child class gets methods from a parent class

A — The parent (base) class

B — Accesses the parent class

B — Yes automatically through inheritance

A — Yes define speak() in Dog

Section B: Match the Pairs

class Dog(Animal) → Error: Missing colon at end of class definition

super(Animal).__init__() → Error: super() takes no arguments in Python 3

class Dog(Animal): → Valid: Dog inherits from Animal

super().__init__() → Ok: Calls the parent class constructor

issubclass(bool, int) → Output: True

isinstance(True, int) → Output: True

Section C: Definitions

Inheritance — A child class receives methods and attributes from a parent class.~~Parent class

Section D: Fill in the Blanks

class Dog(Animal):
    pass

class Dog(Animal):
    def __init__(self, name, breed):
        super().__init__(name)

class Dog(Animal):
    def speak(self):
        return self.name + ' says Woof!'
# this overrides the parent

dog = Dog('Rex')
print(isinstance(dog, Animal))

class Circle(Shape):
    def __init__(self, color, radius):
        super().__init__(color)

Section E: Spot the Error

C — Should call super().__init__(name) to use the parent's initialization

C — Parent's __init__ expects name must pass it: super().__init__(name)

A — Python uses parentheses for inheritance, not 'extends' (that's Java)

C — super needs parentheses: super().__init__, not super.__init__

F — Override method needs self parameter too