Deck 4: Lists

Question 1

A list is an ordered, linear data structure in which each element in the list is accessed by its location in the list.

Answer 1

True

Question 2

Zero-based indexing means that the index value of a list always starts with 0.

Answer 2

True

Question 3

The typical list operations retrieve, update, insert, delete and append each need to be provided with an index value.

Answer 3

False

Question 4

List traversal is the process of accessing, one-by-one, each element in a list.

Question 5

List traversal always begins with the first element of a list.

Question 6

What would be the range of index values for a list of 10 elements?

A) 0 - 9
B) 1 - 10
C) 0 - 10

Question 7

Which of the following typical list operations does not need to be provided an index value?

A) append
B) insert
C) delete

Question 8

The process of accessing each element of a list, one-by-one, is referred to as

A) list stepping
B) list traversal
C) linear access

Question 9

Match the descriptions with their terms:

-removes the item in a list a the specified index value

A) retrieve
B) update
C) insert
D) delete
E) append

Question 10

Match the descriptions with their terms:

-adds at new value in a list at the specified index value

A) retrieve
B) update
C) insert
D) delete
E) append

Question 11

Match the descriptions with their terms:

-gets the value in the list at the specified index value

A) retrieve
B) update
C) insert
D) delete
E) append

Question 12

Match the descriptions with their terms:

-adds a provided value to the end of the list

A) retrieve
B) update
C) insert
D) delete
E) append

Question 13

Match the descriptions with their terms:

-replaces the value at the specified index location and a provided value

A) retrieve
B) update
C) insert
D) delete
E) append

Question 14

A linear data structure is simply referred to as a _______.

Question 15

Lists in which the first index value is always 0 is referred to as _______________________.

Question 16

Five basic operations performed on lists are __________, ___________, ___________,______________, and _____________.

Question 17

The process of accessing each element of a list, one-by-one, is referred to as___________________.

Question 18

Lists must contain at least one element in Python.

Question 19

Lists in Python use zero-based indexing.

Question 20

Lists in Python as mutable, which means that the contents of the list may be altered.

Question 21

An empty list in Python is denote as [''].

Question 22

In Python, square brackets are used to both create a list and access its individual elements.

Question 23

Tuples are the same as lists in Python, with the exception that they are immutable.

Question 24

An empty tuple is denote as ( ) in Python.

Question 25

Of the basic list operations of retrieve, update, insert, delete and append, only the append operation can be used on tuples.

Question 26

The + operator is used to concatenate two lists or two strings into one.

Question 27

Because lists can contain elements of any type, they can also contain lists as their elements, allowing for the creation of arbitrarily complex data structures.

Question 28

Strings, tuples and strings are collectively referred to as sequences in Python, and therefore the elements of each type can be accessed by index value.

Question 29

The slice operation removes an index range of values from a list.

Question 30

Which of the following is not a characteristic of lists in Python?

A) mutable
B) variable length
C) may contain mixed-type elements
D) nonlinear

Question 31

Which of the following is the proper way to denote an empty list in Python?

A) ['']
B) [ ]
C) ['empty']
D) all of the above

Question 32

Which of the following is the correct way to access the fourth element of a list named lst?

A) lst[4]
B) lst[3]
C) lst['3']
D) lst['4']

Question 33

Square brackets are used with lists in Python to

A) access a particular element of a list
B) to create a list with specified elements
C) to create an empty list
D) all of the above

Question 34

Which of the following is not a valid list in Python?

A) [85, 'sunny', 'June 5']
B) [10; 20; 30]
C) ['one', 'two', 'three']
D) all of the above

Question 35

For lst = [10, 20, 30, 40, 50], what value is accessed by list[3]?

A) 30
B) 40
C) '30'
D) '40'

Question 36

What should the value of k be for lst[k] to access the tenth element of list lst?

A) 9
B) 9.0
C) '9'
D) All of the above

Question 37

For lst = [10, 20, 30, 40, 50], what value is the value of lst after del lst[3] is performed?

A) [10, 20, 30]
B) [30, 40, 50]
C) [10, 20, 40, 50]
D) [10, 20, 30, 50]

Question 38

For lst = [10, 20, 30, 40, 50], what value is the value of lst after lst.append(0) is performed?

A) [0, 10, 20, 30, 40, 50]
B) [10, 20, 30, 40, 50, 0]
C) [0]
D) [ ]

Question 39

For lst = [10, 20, 30, 40, 50], what is the value of lst after lst.insert(3, 0) is performed?

A) [10, 20, 0, 30, 0, 40, 50]
B) [10, 20, 30, 0, 40, 50]
C) [10, 20, 30, 40, 0, 50]
D) [10, 20, 30, 40, 50, 0]

Question 40

For lst = [10, 20, 30, 40, 50], what is the resulting value of lst[2:4]?

A) [20, 30]
B) [20, 30, 40]
C) [30, 40]
D) [30, 40, 50]

Question 41

For some list lst, what will be the result of the execution of the instruction lst.insert(1, 3)?

A) insert the value 1 at the location of the third element in the list
B) insert the value 1 at the location of the fourth element in the list
C) replace the third element in the list with the value 1
D) replace the fourth element in the list with the value 1

Question 42

Which of the following is the correct notation for a tuple of only one element?

A) (10,)
B) (10)
C) (,10,)
D) All of the above

Question 43

Which of the following operations cannot be used with tuples?

A) len
B) slice
C) del
D) concatenation

Question 44

For nested list lst = [ [10, 20, 30], [40, 50, 60] ], which of the following is the correct means of assessing the element with the value 40?

A) lst[0][0]
B) lst[0][1]
C) lst[1][0]
D) lst[2][1]

Question 45

In Python, all lists are indexed starting with an index value of 0. This is referred to as _______________________.

Question 46

In Python, ____________ are the same as lists, except that their contents cannot be altered.

Question 47

The ___ operator symbol is used to represent the concatenation of two lists or strings.

Question 48

An operator symbol (such as +) that is used to denote to different possible operations (arithmetic addition and concatenation) is referred to as an ________________ operator.

Question 49

Lists, tuples and strings are collectively referred to as _______________ in Python.

Question 50

The ______________ operation in Python can be used to obtain a sublist (ubstring) or a given list (string).

Question 51

Give Python code that replaces the value 25 in list lst = [10, 20, 25, 40] with the value 40.

Question 52

Give Python code that inserts the value 35 in lst = [10, 20, 25, 40] so that the values in the list remain in numerical order.

Question 53

Give Python code that adds to the (empty) list lst = [ ] the values 10, 20, 30 such that lst = [10, 20, 30]

Question 54

Give Python code to determine if two lists, lstA and lstB, both of length 4, have the same values (e.g., are equal), setting Boolean value True or False to equal_lists, accordingly.

Question 55

Give Python code that prompts the user for a series of positive numbers, and stores them in a list named num_list in the order that they are entered.

Question 56

For statements are used for the construction of definite loops.

Question 57

For loops can be used with all sequence types, except for strings.

Question 58

The built-in range function in Python is used for generating a sequence of integers.

Question 59

When iterating over a list, a for loop may be used to either iterate over the list values, or the index values of the list.

Question 60

In for loops, the loop variable always serves as an index variable.

Question 61

The for loop Is always the best iterative control structure to use when traversing over indexed data structures in Python.

Question 62

Although while loops can be nested, for loops cannot because of their use of a loop variable.

Question 63

Which of the following best describes the kind of control flow that a for loop provides?

A) definite loop
B) indefinite loop
C) terminating loop
D) finite loop

Question 64

Examine the following Python code,
NumList = [1, 4, 6, 8, 10, 3, 12]
For k in range(0, len(numList)):
Print(numList[k])
How many times does the above loop iterate?

A) 0
B) 6
C) 7
D) 8

Question 65

Examine the following Python code,
NumList = [1, 4, 6, 8, 10, 3, 12]
For k in numList:
Print(k)
How many times does the above loop iterate?

A) 0
B) 6
C) 7
D) 8

Question 66

Examine the following Python code,

A) the first only
B) the first and second only
C) the second and third only
D) each of the loops

Question 67

The for statement is used to construct __________ loops.

Question 68

For statement can be applied both lists and tuples, as well as _____________.

Question 69

The built-in ________ function in Python can be used for generating a sequence of integers.

Question 70

When iterating over a list by use of a for loop, the loop variable may range over the ____________ of the list, or the ___________ values.

Question 71

Give Python code to add up all the elements in a list of integers named nums, and displays the result.

Question 72

Give Python code that displays how many even elements there are in a list of integers named nums.

Question 73

Give Python code that determines the average of only the positive integers in a list of positive and negative integers named nums.

Question 74

For fruit = ' banana', what is displayed by the following Python code?
for k in range(0, len(fruit), 2):
print(fruit[k], end='')

Question 75

Give Python code that, for two lists of integers (of the same length) named nums1 and num2, creates a third list named nums3 containing the sum of the corresponding numbers in each list, as demonstrated below.
num1 [1, 2, 3, 4] num2[10, 20, 30, 40] $\rightarrow$ num3[11, 22, 33, 44]

Question 76

When a variable is assigned to another variable holding a list, each variable ends up referring to the same instance of the list in memory.

Question 77

List comprehensions are an alternate means of generating the same sequences that can be generated using the built-in range function in Python.

Question 78

Examine the following lines of Python code:
Lst1 = [1, 2, 3, 4]
Lst2 = [1, 2, 3, 4]
Lst1 == lst2
What will the last line return?

A) True
B) False
C) an error

Question 79

Examine the following lines of Python code:
Lst1 = [1, 2, 3, 4]
Lst2 = lst1
Lst1 == lst2
What will the last line return?

A) True
B) False
C) an error

Question 80

Examine the following lines of Python code:
Lst1 = [1, 2, 3, 4]
Lst2 = lst1
Lst1 [0] = 10
Lst1 == lst2
What will the last line return?

A) True
B) False
C) an error