Python Data Types and Variables 3

Question 1

What is the result of `isinstance(True, int)`?

Accepted Answer

True

Answer

Since `bool` is a subclass of `int`, `isinstance(True, int)` returns `True`.

Question 2

Which Python built-in returns the memory address of an object?

Accepted Answer

id()

Answer

`id()` returns the unique integer identity (memory address) of an object.

Question 3

What happens when you assign `a = b = c = 10` in Python?

Accepted Answer

All three variables point to the same object 10

Answer

Chained assignment makes all three names reference the same integer object 10.

Question 4

What is the output of `x = 10; del x; print(x)`?

Accepted Answer

NameError

Answer

`del x` removes the name binding, so accessing `x` afterwards raises `NameError`.

Question 5

Which expression uses augmented assignment to add 5 to variable `n`?

Accepted Answer

n += 5

Answer

`n += 5` is the augmented assignment operator that adds 5 to `n` in place.

Python Practice Test