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1.

What is the difference between a class and an object?

They're the same thing.

A class is a blueprint. An object is the concrete instance you build from the blueprint.

A class has data and an object doesn't.

A class has methods and an object doesn't.

2.

How does Python implement accessors?

It uses prefixes. One underscore, _, at the beginning of the name indicates this variable is protected. Two underscores, __, make the variable private and will raise an exception if assigned.

It uses keywords private and public.

Everything in a Python class is hidden by default and must be exposed by adding methods that return the variables' values.

Add the decorator @public or @private to make something public or private.

3.

Choose the best explanation that explains the parameter self.

It's a parameter that refers to the object instance. You can also use this.

The self parameter refers to the underlying class of the object.

The only time self is used is to refer to members of the object, and it's passed as a parameter.

The self parameter refers to the object instance. Assignment to self means that the attribute ends up on the object instance.

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