## Are you ready?

**1** questions to solve.

Instructions

- This quiz goes to full-screen once you press the Start button, or any Next button after exiting the quiz window.
- At the end of the quiz, you are able to review all the questions that you answered wrong and see their explanations.

What does the number

`0xff`

represent?`0xff`

is a Python integer represented in hexadecimal format. It denotes the integer `255`

.What does the number

`0b101`

represent?`0b101`

denotes the integer `5`

, in binary format. This goes with choice (D).Are the two numbers

`0B111`

and `0b111`

equivalent?The prefix

`b`

, used to denote binary numbers in Python, is case-insensitive. That is, it doesn't matter if we use it as `b`

or as `B`

. This means that `0B111`

and `0b111`

are both indeed equivalent.What does

`int('0b1111', 2)`

return?The

`int()`

function converts a given numeric string into an integer based on the base denoted by its second parameter. In this case, `int('0b1111', 2)`

converts the string `'0b1111'`

into an integer based on the binary expansion, yielding `15`

. Hence, the correct choice is (A). For more details, refer to Python Base n Representation — converting from string to decimal.What does

`bin(10)`

return?The

`bin()`

function converts a given integer into a binary string. Hence, `bin(10)`

converts `10`

into `'0b1010'`

.What does

`hex(15)`

return?The

`hex()`

function converts a given integer into a hexadecimal string. Hence, `hex(15)`

converts `15`

into `'0xf'`

.Which of the following number systems does the number

`0o17`

denote?The

`o`

prefix in Python integers denotes octal numbers. Hence, the correct choice is (B).