Programming 2 - Lesson 03

What does a dictionary in Python do?

• Stores ordered collections of items

• Maps keys to value

• Represents empty data structures

• Allows you look up keyword definitions

How do you create an empty dictionary in Python?

• empty_dict = []

• empty_dict = dict()

• empty_dict = {}

• empty_dict = ()

What is the output of the following code:

game_scores = {'player1': 1000, 'player2': 1500}

print(game_scores['player1'])

• 1000

• player1

• 1500

• None

What will happen if you try to access a key that doesn’t exist in the dictionary?

• It will return None.

• It will create a new key-value pair.

• It will raise a KeyError.

• It will return an empty string

What does the len function do when applied to a dictionary

• Returns the number of key-value pairs

• Returns the number of keys

• Returns the number of values

• Returns the total number of characters in keys and values

What does the following code output:

game_levels = {'level1': 'easy', 'level2': 'medium', 'level4': 'hard'}

'level3' in game_levels

• True

• False

• None

• 'hard'

How do you add a new key-value pair to a dictionary named 'inventory'

where the key is 'potion' and the value is 5?

• inventory.add('potion', 5)

• inventory.append('potion', 5)

• inventory['potion'] = 5

What keyword is used to modify a global variable inside a function?

• local

• var

• None

• global

• Link has health points.

• Link has {health} health points.

• player has health health points.

• Link has 75 health points.

• Local score: 10 Global score: 50

• Local score: 10 Global score: 10

• Local score: 0

  Global score: 50

• Local score: 50 Global score: 50