2.15. Multiple Choice Questions — Python for Everybody

csp-10-2-1: What is the value of 15 / 12?

1
Try again, this is the answer for 15 // 12.
1.25
15 / 12 will result in 1.25. The / operator returns a floating point result.
1.5
Try running this in your python interpreter.
3
Try again, this is the answer for 15 % 12.

csp-10-2-2: What is the value of 15 // 12?

1
The // operator returns an integer result (the floor).
1.25
Try again, this is the answer for 15 / 12.
1.5
Try running this in your python interpreter.
3
Try again, this is the answer for 15 % 12.

csp-10-2-3: What is the value of 15 % 12?

1
Try again, this is the answer for 15 // 12.
1.25
Try again, this is the answer for 15 / 12.
1.5
Try running this in your python interpreter.
3
The % (modulo) operator returns the remainder and 12 goes into 15 one time with a remainder of 3.

csp-10-2-4: What is the data type of 'this is what kind of data'?

Character
It is not a single character.
Integer
The data is not numeric.
Float
The value is not numeric with a decimal point.
String
Strings can be enclosed in single quotes.

csp-10-2-5: What is printed when the following statements execute?

day = "Thursday"
day = 32.5
day = 19
print(day)

Nothing is printed. A runtime error occurs.
It is legal to change the type of data that a variable holds in Python.
Thursday
This is the first value assigned to the variable day, but the value is changed.
32.5
This is the second value assigned to the variable day, but the value is changed.
19
The current value of the variable day will be printed.

csp-10-2-6: What is printed when the following statements execute?

n = input("Please enter your age: ")
# user types in 18
print ( type(n) )

<class 'str'>
All input from users is read in as a string.
<class 'int'>
Even though the user typed in an integer, it does not come into the program as an integer.
<class 18>
18 is the value of what the user typed, not the type of the data.
18
18 is the value of what the user typed, not the type of the data.

csp-10-2-7: What is the value of the following expression:

16 - 2 * 5 // 3 + 1

14
Using parentheses, the expression is evaluated as (2*5) first, then (10 // 3), then (16-3), and then (13+1).
24
Remember that * has precedence over -.
3
Remember that // has precedence over -.
13.667
Remember that // does integer division.

csp-10-2-8: After the following statements, what are the values of x and y?

x = 15
y = x
x = 22

x is 15 and y is 15
Look at the last assignment statement which gives x a different value.
x is 22 and y is 22
No, x and y are two separate variables. Just because x changes in the last assignment statement, it does not change the value that was copied into y in the second statement.
x is 15 and y is 22
Look at the last assignment statement, which reassigns x, and not y.
x is 22 and y is 15
Yes, x has the value 22 and y the value 15.

csp-10-2-9: Given the following code segment, what will be printed?

street = "125 Main Street"
print("The address is " + "street")

The address is street
Since street is in double quotes it will print the string street rather than the value of the variable street.
The address is 125 Main Street
This would be true if it was print("The address is " + street)
It won't execute
While this isn't printing what we probably want it to, it will print something.

csp-10-2-10: Assume that width = 17 and height = 12.0. For each of the following expressions, match them up with the value of the expression and the type (of the value of the expression).

Try running these commands in your terminal window.

(width//2)
8, integer
(width/2.0)
8.5, float
(height/3)
4.0, float
(1 + 2 * 5)
11, integer

csp-10-2-11: Given the following code segment, what will be printed?

friends = 4
name = "Derrik"
print("name" + " has " + str(friends) + " friends")

Derrick has 4 friends
Since name is in quotes it will print those characters rather than the value of name.
name has 4 friends
Since name is in quotes it will print those characters rather than the value of name, but it will print the value of friends after it converts it to a string.
name has friends friends
This would be true if both name and friends were in quotes.
There will be an error
This would be true if the friends can not been converted to a string

csp-10-2-12: Given the following code segment, what will be printed?

pets = 2
name = "Mariah"
print(name + " has " + pets + " pets")

Mariah has 2 pets
This would be true if there wasn't an error
name has 2 pets
This would be true if name was in quotes
Mariah has pets pets
This would be true if pets was in quotes
There will be an error
You can't concatenate an integer with a string. You need to convert it to a string first.

2.15. Multiple Choice Questions¶