The Ultimate Guide to Python Programming With Python 3.10 - Class Variables and Instance Variables

The video tutorial explains the difference between class and instance variables using a dollar class example. It demonstrates how instance variables are unique to each instance, while class variables are shared among all instances. The tutorial shows how modifying a class variable through the class name affects all instances, whereas changing it through an instance only affects that instance, overshadowing the class variable.

What is the primary difference between class variables and instance variables?

• Class variables are unique to each instance, while instance variables are shared.

• Both class and instance variables are unique to each instance.

• Class variables are shared among all instances, while instance variables are unique to each instance.

• Both class and instance variables are shared among all instances.

What happens when you change a class variable using the class name?

• The class variable is deleted.

• The class variable becomes an instance variable.

• The change is reflected in all instances of the class.

• The change affects only the instance where it was changed.

If you change a class variable using an instance, what is the outcome?

• The class variable remains unchanged for all instances.

• The class variable is deleted.

• A new instance variable is created, overshadowing the class variable.

• The class variable is updated for all instances.

How can you ensure a change to a class variable affects all instances?

• By deleting the class variable first.

• By changing the variable using any instance.

• By changing the variable using the class name.

• By creating a new instance variable.

What is the effect of overshadowing in the context of class variables?

• It has no effect on the class variable.

• It deletes the class variable.

• It updates the class variable for all instances.

• It creates a new instance variable that hides the class variable.