Dictionaries and Sets Quiz

To pass the quiz, you must correctly answer at least 18 of the 20 questions below. # --quizzes-- ## --quiz-- ### --question-- #### --text-- What is a dictionary? #### --distractors-- A data structure that only holds strings and lists. --- A data structure that is a collection of key-value pairs that only accept large numbers. --- A data structure that only holds a collection of tuples. #### --answer-- A data structure that is a collection of key-value pairs. ### --question-- #### --text-- Which of the following is the correct syntax for a dictionary? #### --distractors-- ```py dictionary = { <key1: value1>, <key2: value2> } ``` --- ```py dictionary = { (key1: value1), (key2: value2) } ``` --- ```py dictionary = { [key1: value1], [key2: value2] } ``` #### --answer-- ```py dictionary = { key1: value1, key2: value2 } ``` ### --question-- #### --text-- Which of the following is true about dictionaries? #### --distractors-- Keys must be at least two characters in length. --- Keys must include a special symbol. --- Keys must include at least one number. #### --answer-- Keys must be unique. ### --question-- #### --text-- Which of the following constructors can be used to create a dictionary? #### --distractors-- `diction()` --- `dic()` --- `dictionary()` #### --answer-- `dict()` ### --question-- #### --text-- Which of the following is the correct way to access a value from a dictionary? #### --distractors-- `dictionary<key>` --- `dictionary/key/` --- `dictionary{key}` #### --answer-- `dictionary[key]` ### --question-- #### --text-- Which of the following is the correct way to update a value in a dictionary? #### --distractors-- `pizza['name'] >> 'Margherita'` --- `pizza['name'] << 'Margherita'` --- `pizza['name'] == 'Margherita'` #### --answer-- `pizza['name'] = 'Margherita'` ### --question-- #### --text-- Which of the following methods can be used to retrieve a value associated with a key? #### --distractors-- `access()` --- `set()` --- `retrieve()` #### --answer-- `get()` ### --question-- #### --text-- What is a view object? #### --distractors-- A special object used to turn strings into dictionaries. --- A way to view the content of a dictionary only if the dictionary has two or more key-value pairs. --- A special object used to turn lists into dictionaries. #### --answer-- A way to see the content of a dictionary without creating a separate copy of the data. ### --question-- #### --text-- Which of the following methods returns a view object with all the key-value pairs in the dictionary? #### --distractors-- `lists()` --- `dictionaries()` --- `collections()` #### --answer-- `items()` ### --question-- #### --text-- Which of the following methods removes all of the key-value pairs from the dictionary? #### --distractors-- `empty()` --- `replace()` --- `remove()` #### --answer-- `clear()` ### --question-- #### --text-- What will be the output for the following code? ```py products = { 'Laptop': 990, 'Smartphone': 600, 'Tablet': 250, 'Headphones': 70, } for product in products.items(): print(product) ``` #### --distractors-- ```py <'Laptop', 990> <'Smartphone', 600> <'Tablet', 250> <'Headphones', 70> ``` --- ```py 'Laptop', 990 'Smartphone', 600 'Tablet', 250 'Headphones', 70 ``` --- ```py ['Laptop', 990] ['Smartphone', 600] ['Tablet', 250] ['Headphones', 70] ``` #### --answer-- ```py ('Laptop', 990) ('Smartphone', 600) ('Tablet', 250) ('Headphones', 70) ``` ### --question-- #### --text-- Which of the following is true about sets? #### --distractors-- Sets are mutable and ordered in reverse. --- Sets are mutable and ordered. --- Sets are immutable and unordered. #### --answer-- Sets are mutable and unordered. ### --question-- #### --text-- Which of the following is the correct way to create a set? #### --distractors-- `my_set = (1, 2, 3, 4, 5)` --- `my_set = <1, 2, 3, 4, 5>` --- `my_set = [1, 2, 3, 4, 5]` #### --answer-- `my_set = {1, 2, 3, 4, 5}` ### --question-- #### --text-- Which of the following functions is used to create an empty set? #### --distractors-- `create_set()` --- `empty_set()` --- `sets()` #### --answer-- `set()` ### --question-- #### --text-- What will be output to the terminal? ```py my_set = {1, 2, 3, 4, 5, 6} my_set.add(5) print(my_set) ``` #### --distractors-- `SyntaxError` --- `RangeError` --- `{1, 2, 3, 4, 5, 5, 6}` #### --answer-- `{1, 2, 3, 4, 5, 6}` ### --question-- #### --text-- Which of the following methods checks if a set is a subset? #### --distractors-- `issub()` --- `isset()` --- `subset()` #### --answer-- `issubset()` ### --question-- #### --text-- Which of the following methods checks if two sets are disjoint? #### --distractors-- `joint()` --- `isjoint()` --- `disjoint()` #### --answer-- `isdisjoint()` ### --question-- #### --text-- What does the symmetric difference operator(`^`) do? #### --distractors-- It returns a new set with only the elements that the sets have in common. --- It finds the difference between the sets and updates the first set with that result. --- It returns a new set with the elements of the first set that are not in the other set. #### --answer-- It returns a new set with the elements that are either in the first or the second set, but not both. ### --question-- #### --text-- Which of the following built-in modules is used for generating random numbers? #### --distractors-- `set_random` --- `get_random` --- `rand` #### --answer-- `random` ### --question-- #### --text-- Which of the following modules is used for working with regular expressions? #### --distractors-- `regex` --- `reg` --- `r` #### --answer-- `re`