Quiz - Module 7

_____ is the process where objects that are no longer needed are deleted.

Garbage collection

What is the value of y after the following code is executed? Note that the question asks for y, not x. x = 10 y = x + 2 x = 12

12

Assigning a value to a floating point variable that is too large for the computer to represent is a condition called _____ .

overflow

15 _____ 3 = 0

%

If text_line = 'one fish two fish', what is the value of text_line[6]?

's'

15 _____ 3 = 5.0

/

What is displayed when the following code is executed? empty_string = '' print(len(empty_string))

0

What is the ending value of z? x = 0.3 z = math.pow(math.ceil(x), 2)

1.0

An item passed to a function is a(n) _____ .

argument

Which floating-point literal correctly represents the scientific notation value: 2.3 x 10^7?

2.3e7

Which of the following is not a valid expression? Assume x and y are integer variables.

2x + 3y

In Python, which of the following literals is shown in valid scientific notation?

3.0004e-12

What is the value of 11 // 2?

5

Which of the following data values is best represented with a floating point variable?

The speed of a snail.

Which statement assigns the string variable airport_code with the value JFK?

airport_code = 'JFK'

The operator *= is called a(n) _____ operator.

compound operator

The built-in Python function that gives an object's identity is:

id()

Objects like integers and strings that can't be modified are called _____ .

immutable

The formula for calculating the amount of interest charged on a loan is: interest = [principal x rate] of interest x time. Which Python statement correctly performs the interest calculation?

interest = (principal * interest) * time

Assume a and b are variables that hold the base and height of a right triangle. The length of the long side (hypotenuse) is calculated as the square root of a^2 + b^2. Which expression calculates the length of the hypotenuse?

math.sqrt(math.pow(a, 2)) + math.pow(b, 2)))

Which expression gives the number of whole minutes that corresponds to some number of seconds?

seconds // 60

According to Python's precedence rules, which of the following operators has the highest precedence?

unary -

A _____ is a named item used to hold a value.

variable

Which expression using parentheses is equivalent to the following expression: x - y * -z / 3

x - ((y * (-z)) / 3)

Which statement is equivalent to the following assignment? x -= 2 + y

x = x - (2 + y)