Python Inheritance & Polymorphism

What is single inheritance in Python?

• A class can inherit from multiple parent classes in Python.

• Single inheritance means a class can inherit from itself in Python.

• Single inheritance allows a class to inherit from both parent and child classes in Python.

• A class can inherit from only one parent class in Python.

Explain multiple inheritance in Python with an example.

• class MultiDerived(Base2, Base1): pass

• class Combined(Base1): pass

• class Base1: def greet(self): print('Hello from Base1') class Base2: def welcome(self): print('Welcome from Base2') # Multiple inheritance class MultiDerived(Base1, Base2): pass multi = MultiDerived() multi.greet() multi.welcome()

• class Derived(Base1, Base2): pass

How can method overriding be achieved in Python?

• Define a method in the parent class with a different name than the child class method.

• Use multiple inheritance to override the method.

• Define a method in the child class with the same name as a method in the parent class.

• Create a new method in the child class without the same name as the parent class method.

What is the purpose of the super() function in Python?

• To define a new class

• To create an instance of a class

• To handle exceptions

• To call the parent class's methods and constructors within a child class.

Discuss the concept of polymorphism in Python.

• Polymorphism in Python allows objects of different classes to be treated as objects of a common superclass.

• Polymorphism in Python only works with objects of the same class.

• Polymorphism in Python is a feature that allows objects to inherit from multiple classes.

• Polymorphism in Python is used to convert data types automatically.

How does Python support inheritance?

• Python uses 'extends' keyword for inheritance.

• Python supports inheritance through the 'class ChildClass(ParentClass):' syntax.

• Inheritance in Python is achieved through interfaces.

• Python inheritance is implemented with 'inherits' keyword.

What are the advantages of using multiple inheritance in Python?

• Code reusability, flexibility in design, ability to create complex class hierarchies

• Increased performance, Reduced complexity, Improved readability

Give an example of method overriding in Python.

• class Parent: def display(self): print('Parent method')

• obj = Parent() obj.display()

• class Parent: def show(self): print('Parent method') class Child(Parent): def show(self): print('Child method') obj = Child() obj.show()

• class Child(Parent): def display(self): print('Child method')

When should super() be used in Python?

• When you want to print a message to the console.

• When you want to call a method from a parent class in a child class.

• When you want to import a module.

• When you want to create a new instance of a class.

Explain the difference between compile-time polymorphism and runtime polymorphism.

• Compile-time polymorphism is resolved at runtime based on the actual object type, while runtime polymorphism is resolved at compile time based on the number and types of arguments passed.

• Compile-time polymorphism and runtime polymorphism are the same concept with different names.

• Compile-time polymorphism is resolved at runtime based on the number and types of arguments passed, while runtime polymorphism is resolved at compile time based on the actual object type.

• Compile-time polymorphism is resolved at compile time based on the number and types of arguments passed, while runtime polymorphism is resolved at runtime based on the actual object type.