Test 2

What is the primary purpose of a dictionary in Python?

• Storing elements in a sorted order.

• Storing only numeric data.

• To perform mathematical operations

• To store data values in key:value pairs

What does it mean for a dictionary to be changeable?

• Items can be added, removed, or modified after the dictionary has been created

• The items cannot be modified

• The items have a defined order

• The dictionary cannot have duplicate items

How can you determine the number of items in a dictionary?

• Using the count() method

• Using the length() function

• Using the len() function

• Using the size() method

What data types can the values in dictionary items be?

• Only int data type

• Only boolean data type

• Only string data type

• String, int, boolean, and list data types

Suppose you have the following dictionary, which stores the names and ages of people.

Which line correctly prints Bo’s age?

• print(my_dictionary[0])

• print(my_dictionary[0][1])

• print(my_dictionary["Bo"])

• print(my_dictionary["Bo"][1])

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

A dictionary maps:

• strings to strings

• strings to numbers

• indices to elements

• keys to values

What is the output of this program?

• tree

  flower

  weed

• tree : oak

  flower : daisy

  weed : bindweed

• oak

  daisy

  bindweed

• tree oak

  flower daisy

  weed bindweed

person = {"name":"Alex" , "birthyear":"2005" , "gender":"male"}

Which of the following will give an error?

• print(2023-person["birthyear"])

• print(person.get("phone"))

• print(person["gender"])

• None of the options

nums = {2, 4, 5, 3, 2, 1}

print(len(nums))

What will be printed?

• 6

• 2 4 5 3 1

• 5

• 4