Data Types and Variables Flashcards

7 cards from real Python practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Data Types and Variables flashcards as text

What is the result of `0.1 + 0.2 == 0.3` in Python?
Answer: False
Floating-point representation errors mean 0.1 + 0.2 is not exactly 0.3 in IEEE 754.
Which module provides the `Decimal` type for exact decimal arithmetic?
Answer: decimal
The `decimal` module provides the `Decimal` class for arbitrary-precision decimal arithmetic.
What is the output of `print(10 // 3)`?
Answer: 3
Floor division `//` divides and rounds down to the nearest integer, giving 3.
Which built-in function converts a string of binary digits to an integer?
Answer: int(x, 2)
`int(x, 2)` interprets the string `x` as a base-2 (binary) number.
What type does `x` have after `x = []`?
Answer: list
Square brackets `[]` create an empty list object.
What is the result of `bool('')`?
Answer: False
An empty string is falsy in Python, so `bool('')` returns `False`.
Which of the following creates a bytes literal in Python?
Answer: b'hello'
Prefixing a string literal with `b` (e.g., `b'hello'`) creates a bytes object.