Unit 9

Given the following list,

my_list = [ [0, 1, 2], [3, 4, 5], [6, 7, 8], [9, 10, 11] ]

Which line of code would print the number ‘5’ to the screen?

• print(my_list[1])

• print(my_list[1:2])

• print(my_list[1][2])

• print(my_list[2][3])

What kind of data structure is user_data in the following declaration?

user_data = {"name": "TJ", "age":24, "user_name":"artLover123"}

• Tuple

• List

• Dictionary

• 2D List

What is the output of this program?

• 12

  45

  1

  3

  7

  2

  5

  8

  3

• 12

  3

  5

  45

  7

  8

  1

  2

  3

• 12

  3

  5

• 3

  2

  1

  8

  7

  45

  5

  3

  12

Which of the following code snippets will create this 2D list?

• board = [1, 2, 3] + [4, 5, 6] + [7, 8, 9]

• board = [1, 2, 3]

  board.append([4, 5, 6])

  board.append([7, 8, 9])

• board = [1, 2, 3, 4, 5, 6, 7, 8, 9]

• board = [] board.append([1, 2, 3]) board.append([4, 5, 6]) board.append([7, 8, 9])

Which of the following list comprehensions will create the same list as the for loop below?

• my_list = [i for i in range(6)]

• my_list = [i*2 for i in range(6)]

• my_list = [i for i*2 in range(6)]

• This cannot be done using a list comprehension statement.

What does “packing” refer to in Python?

• Creating a list

• Initializing variables using values from a list

• Storing multiple variables’ values by putting them in a collection, like a list or tuple

• Cramming as many commands as possible onto a single line

What does “unpacking” refer to in Python?

• Creating a list

• Initializing multiple variables at a time using a collection of values

• Storing multiple variables’ values by putting them in a collection, like a list or tuple

• Cramming as many commands as possible onto a single line

Which of the following assignment statements is equivalent to the following code snippet?

red, blue, green = "BLUE", "GREEN", "RED"

• red = "RED"

  blue = "BLUE" green = "GREEN"

• red = "BLUE"

  blue = "GREEN" green = "RED"

• red = ["BLUE", "GREEN", "RED"]

  blue = ["BLUE", "GREEN", "RED"] green = ["BLUE", "GREEN", "RED"]

• red = "BLUE"

  blue = "BLUE" green = "BLUE"

A dictionary maps:

• strings to strings

• strings to numbers

• indices to elements

• keys to values

Use the following definitions of foods and groceries.

foods = ["apples", "eel", "kale"]

groceries = ["apples", "eel", "kale"]

Which of the following statements would evaluate to True about foods and groceries?

I. foods == groceries

II. foods is groceries

• I only

• II only

• Both I and II

• Neither I nor II