Python Data Types and Variables 4

Question 1

What is the result of `0.1 + 0.2 == 0.3` in Python?

Accepted Answer

False

Answer

Floating-point representation errors mean 0.1 + 0.2 is not exactly 0.3 in IEEE 754.

Question 2

Which module provides the `Decimal` type for exact decimal arithmetic?

Accepted Answer

decimal

Answer

The `decimal` module provides the `Decimal` class for arbitrary-precision decimal arithmetic.

Question 3

What is the output of `print(10 // 3)`?

Accepted Answer

3

Answer

Floor division `//` divides and rounds down to the nearest integer, giving 3.

Question 4

Which built-in function converts a string of binary digits to an integer?

Accepted Answer

int(x, 2)

Answer

`int(x, 2)` interprets the string `x` as a base-2 (binary) number.

Question 5

What type does `x` have after `x = []`?

Accepted Answer

list

Answer

Square brackets `[]` create an empty list object.

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