Purdue CNIT 155 Final Exam (Python)
ACTUAL QUESTIONS AND CORRECT
ANSWERS
What is a List? - Correct answers ✔✔A data structure that can store many values of under one
name
Which is an example of how to create an empty list? - Correct answers ✔✔Variable = []
Variable = list()
Which is an example of how to create a list with predefined values? - Correct answers ✔✔colors
= ["red, "yellow", "blue"]
To create a list with predefined values, you have to.... - Correct answers ✔✔Put a sequence of
items in []
What does list1.append(elem) do? - Correct answers ✔✔Adds a single element to the end of the
list
What does list1.insert(index, elem) do? - Correct answers ✔✔Inserts the element elem at the
given index, shifting elements to the right
What does list1.extend(list2) do? - Correct answers ✔✔Add the elements in list2 to the end of
the list.
T or F: The extend method is not only used with a list. - Correct answers ✔✔False
,T or F: Using + or += on a list is similar to using the extend method. - Correct answers ✔✔True
How do you access the individual element in a list using an index? - Correct answers
✔✔list1[index]
What are characteristics of Positive Indexes? - Correct answers ✔✔First element in the list has
index 0, second element has index 1, and n'th element is n-1
What are characteristics of Negative Indexes? - Correct answers ✔✔Identify positions relative to
the end of the list, index -1 identifies the last element, and -2 identifies the next to last element,
etc.
What does Function do? - Correct answers ✔✔Is a description
What does len do? - Correct answers ✔✔Returns the number of items in the list
What does min do? - Correct answers ✔✔Returns the minimum among the elements in the list
What does max do? - Correct answers ✔✔Returns the maximum among the elements in the list
What does sum do? - Correct answers ✔✔Returns the sum of all the elements in the list. (applies
to list of numerical values only)
Given a list, you may use ________ to randomize the order of the elements in a list. - Correct
answers ✔✔Shuffle
, What do you type to import the shuffle function and use the shuffle function with a list? - Correct
answers ✔✔from random import shuffle
shuffle(list1)
You can refer to elements of a list using the... - Correct answers ✔✔Subscript syntax
T or F: The code below makes third have a value of 83.0
scores = [75.0, 68.5, 83.0]
third = scores[2] - Correct answers ✔✔True
T or F: Negative indices count from the right end. - Correct answers ✔✔True
What is the value of third after running the code below?
scores = [75.0, 68.5, 83.0]
third = scores[-1] - Correct answers ✔✔83.0
Which is an example of negative indices? - Correct answers ✔✔scores = [75.0, 68.5, 83.0]
third = scores[-1]
Which is an example of positive indices? - Correct answers ✔✔scores = [75.0, 68.5, 83.0]
third = scores[2]
ACTUAL QUESTIONS AND CORRECT
ANSWERS
What is a List? - Correct answers ✔✔A data structure that can store many values of under one
name
Which is an example of how to create an empty list? - Correct answers ✔✔Variable = []
Variable = list()
Which is an example of how to create a list with predefined values? - Correct answers ✔✔colors
= ["red, "yellow", "blue"]
To create a list with predefined values, you have to.... - Correct answers ✔✔Put a sequence of
items in []
What does list1.append(elem) do? - Correct answers ✔✔Adds a single element to the end of the
list
What does list1.insert(index, elem) do? - Correct answers ✔✔Inserts the element elem at the
given index, shifting elements to the right
What does list1.extend(list2) do? - Correct answers ✔✔Add the elements in list2 to the end of
the list.
T or F: The extend method is not only used with a list. - Correct answers ✔✔False
,T or F: Using + or += on a list is similar to using the extend method. - Correct answers ✔✔True
How do you access the individual element in a list using an index? - Correct answers
✔✔list1[index]
What are characteristics of Positive Indexes? - Correct answers ✔✔First element in the list has
index 0, second element has index 1, and n'th element is n-1
What are characteristics of Negative Indexes? - Correct answers ✔✔Identify positions relative to
the end of the list, index -1 identifies the last element, and -2 identifies the next to last element,
etc.
What does Function do? - Correct answers ✔✔Is a description
What does len do? - Correct answers ✔✔Returns the number of items in the list
What does min do? - Correct answers ✔✔Returns the minimum among the elements in the list
What does max do? - Correct answers ✔✔Returns the maximum among the elements in the list
What does sum do? - Correct answers ✔✔Returns the sum of all the elements in the list. (applies
to list of numerical values only)
Given a list, you may use ________ to randomize the order of the elements in a list. - Correct
answers ✔✔Shuffle
, What do you type to import the shuffle function and use the shuffle function with a list? - Correct
answers ✔✔from random import shuffle
shuffle(list1)
You can refer to elements of a list using the... - Correct answers ✔✔Subscript syntax
T or F: The code below makes third have a value of 83.0
scores = [75.0, 68.5, 83.0]
third = scores[2] - Correct answers ✔✔True
T or F: Negative indices count from the right end. - Correct answers ✔✔True
What is the value of third after running the code below?
scores = [75.0, 68.5, 83.0]
third = scores[-1] - Correct answers ✔✔83.0
Which is an example of negative indices? - Correct answers ✔✔scores = [75.0, 68.5, 83.0]
third = scores[-1]
Which is an example of positive indices? - Correct answers ✔✔scores = [75.0, 68.5, 83.0]
third = scores[2]
