Quiz 143 - Python Data Types and Numbers

Which of the following is a string in Python?

• True

• "Hello"

• 3.14

• 123

Answer explanation

In Python, a string is defined by enclosing text in quotes. The correct choice, "Hello", is a string because it is surrounded by double quotes. The other options are a boolean (True), a float (3.14), and an integer (123).

What data type is used to store whole numbers in Python?

• Integer

• Float

• String

• Boolean

Answer explanation

In Python, the data type used to store whole numbers is called 'Integer'. Unlike floats, which represent decimal numbers, integers are used for counting and indexing.

Which function is used to convert a string to an integer?

• int()

• bool()

• str()

• float()

Answer explanation

The function int() is used to convert a string representation of a number into an integer. The other options serve different purposes: bool() converts to a boolean, str() converts to a string, and float() converts to a floating-point number.

What is the result of 17 % 5 in Python?

• 3

• 2

• 12

• 5

Answer explanation

In Python, the modulus operator % returns the remainder of the division. For 17 % 5, 17 divided by 5 is 3 with a remainder of 2. Therefore, the result is 2.

Which operator is used for exponentiation in Python?

• ^

• %

• **

• //

Answer explanation

In Python, the operator for exponentiation is '**'. It raises a number to the power of another, unlike '^' which is a bitwise XOR, '%' for modulus, and '//' for floor division.

What will be the output of bool(0) in Python?

• False

• True

• None

• 0

Answer explanation

In Python, the bool() function converts values to a boolean. The integer 0 is considered falsey, so bool(0) evaluates to False. Therefore, the correct answer is False.

Which of the following is a float in Python?

• 3.0

• 3

• "3.14"

• True

Answer explanation

In Python, a float is a number that has a decimal point. Among the options, 3.0 is a float, while 3 is an integer, "3.14" is a string, and True is a boolean. Therefore, the correct answer is 3.0.

What does the // operator do in Python?

• Modulus

• Integer division

• Addition

• Subtraction

Answer explanation

In Python, the // operator performs integer division, meaning it divides two numbers and rounds down to the nearest whole number. This is different from regular division, which can result in a float.

Which function is used to round a number to a specified number of decimal places?

• round()

• floor()

• ceil()

• sqrt()

Answer explanation

The function round() is used to round a number to a specified number of decimal places. In contrast, floor() and ceil() round to the nearest whole number, while sqrt() calculates the square root.

What is the result of the expression 2 ** 3?

• 9

• 12

• 8

• 6

Answer explanation

The expression 2 ** 3 means 2 raised to the power of 3. This equals 2 * 2 * 2, which is 8. Therefore, the correct answer is 8.