Python Final CH 11
When you iterate over a dictionary, what value is assigned to the loop variable?
Each key in the dictionary.
Which of the following is not a characteristic of a Python list?
It is immutable
What happens after execution of the following Python code? x = [1, 2, 3] y = 4 z = x + y
It produces an error.
Which of the following Python types are mutable?
List and dictionary
Which of the following list methods return a value?
No - append No - all of the answers are correct No - remove No - sort No - reverse Yes - none of the answers are correct
Which of the following types could not be used as value for a Python dictionary?
No - list No - bool Yes - They all could be used. No - string No - tuple
What is the value of y after the following Python code executes? x = 't' y = x in ['s', 't', 'u', 'v']
True
When should you use a Python list to store your data?
Yes -all of the answers are correct No -You find yourself using variables named item1, item2, item3, item4, etc. No - The data is related and you don't know how many items you will need to store. No - The data is related and you want to be able to process it using a loop instead of multiple statements processing each item individually.
What happens after execution of the following code? a = [1, 2, 3] b = [4, 5, 6] a.extend(b)
a contains [1, 2, 3, 4, 5, 6]
What happens after execution of the following code? a = [1, 2, 3] b = [4, 5, 6] a.append(b)
a contains [1, 2, 3, [4, 5, 6]
The method which adds a single item to the end of the list is:
append
Which of the following is not a Python list method?
get
Where mathematicians use subscripting, computer programmer use
indexing
What keyword parameter is used to send a key-function to the sort method?
key
Which of the following types could not be used as key for a Python dictionary?
list
The items dictionary method returns a(n)
sequence of tuples
Which of the following is not dictionary method?
sort
Which of the following expressions correctly tests if x is even?
x % 2 == 0
