What is an 'except block'?

A block of code to handle an exception that has been caught

How do the lines of code in the body of a function get executed?

The function must be called within the program

How does the for loop differ from the while loop?

A for loop interates through items in a sequence

Which statement below displays the value of the class attribute numRectangles of the Rectangle class?

print(Rectangles.numRectangles)

When is a for loop the most appropriate choice when code in your program needs to be repeated?

When the number of times the loop needs to run is known in advance.

What do text files consist of?

Lines of text characters (e.g. ASCII or UTF-8) ending in a line break

What must happen before a text file can be read or written.

The open() command must be called.

Assuming myRectangle is an instance of the Rectangle class, what happens when del(myRectangle) is called?

Rectangle's __del__(self) method is called.

How can an except block be defined to capture specific exceptions?

runtime exception such as ValueError can be specified in the except statem

What is the purpose of curly braces inside an f-string?

includes a variable name for string interpolation

How can you read an entire file at once into a list?

By using the readlines() command.

How can a value be returned by a function?

By using the return statement with the value to be returned

What indicates that a class definition is complete?

The first line of code that is not indented.

When a line is written to a text file

a trailing line break must be included.

What are global variables?

Global variables are variables that are accessed at the main program level.

What does split() do?

split() slices a string into many pieces.

What can you do to prevent run-time exceptions from crashing your program?

Implement try/except blocks anywhere a runtime exception might be possible.

When using a docstring with a function

include the docstring immediately after the function definition statement.

How are values added to a dictionary?

By using square brackets, a key and the assignment operator.

Which of the following statements are true about functions?

Functions are a means to re-use code

A prototype of an object that contains attributes and methods

What does the format specifier '{:20}' do for the display of a string value?

the field should be at least 20 characters wide and left justified

What determines which lines of code belong to a while loop?

The lines of code beneath the while statement that are indented.

How is user input provided to the program?

returned by the input() function and stored in a variable

What makes a tuple different than a list?

A tuple is immutable whereas a list is not.

When is a while loop the most appropriate choice when code in your program needs to be repeated?

When the number of times the loop needs to run is not known in advance.

How can an entire text file be read into a string?

by using the read() command with no parameters.

What are the guidelines for choosing a function name?

Follow the same rules and best practices used for variable names

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Questions 114

Answers

1
What does '>' mean?
is less than
go to the right
is greater than
is equal to
2
Which of the following statements is true about functions?
Functions make maintenance easier
Using functions can help make your programs modular
All of the above
Functions are a means to re-use code
3
Which programming design approach visualizes things with attributes and actions that can manipulate these attributes?
Object Oriented Design
Procedural Design
Manipulative Design
Iterative Design
4
What is an 'except block'?
comments describing under what circumstances the program should fail
A block of code that executes when an exception does not happen
A block of exceptionally good code
A block of code to handle an exception that has been caught
5
With positional parameters
order doesn't matter.
default values must be included.
keyword arguments cannot be used.
order matters.
6
How do the lines of code in the body of a function get executed?
The name of the function is passed in the exec command
As soon as the function is defined the code is executed
Based on the function's condition
The function must be called within the program
7
How can elements be added to a list?
By converting the list to a dictionary.
By using the append() method.
By using the add() list method.
Elements cannot be added to a list.
8
How does the for loop differ from the while loop?
An initial condition must be set up before a for loop
For loops and while loops are identical.
A while loop depends upon items in a sequence whereas a for loop depends
A for loop interates through items in a sequence
9
Which statement below displays the value of the class attribute numRectangles of the Rectangle class?
print(numRectangles)
print(Rectangles)
print(Rectangles.numRectangles)
print(mySquare.numRectangles)
10
The Python programming language became available in what year?
1991
1952
2000
Python will become available next year
11
What command reads just 5 characters from a text file?
stuff = text_file.seek(5)
stuff = read.textfile(5)
stuff = text_file.read(5)
stuff = text_file.readline(5)
12
How many times can a while loop run?
1 or more times.
0 or more times.
Only once
While loops can only walk.
13
Which of the following statements correctly shows the first line of a method definition?
display(self):
class method display(self):
method display(self):
def display(self):
14
When is a for loop the most appropriate choice when code in your program needs to be repeated?
When the number of times the loop needs to run is known in advance.
When the loop needs to run only once.
When the block of code in the loop consists of only one statement.
When the number of times the loop needs to run is not known in advance.
15
What do text files consist of?
Machine language
Binary data
Lines of text characters (e.g. ASCII or UTF-8) ending in a line break
Decimal numbers
16
What must happen before a text file can be read or written.
The file name extension must be changed to '.py'.
The file must be deleted.
The open() command must be called.
The for loop must terminate.
17
Assuming myRectangle is an instance of the Rectangle class, what happens when del(myRectangle) is called?
e constructor method for Rectangle is called.
The destructor method for Rectangle is created.
Rectangle's __del__(self) method is called.
Since del() is not a method of the Rectangle class an exception is thrown.
18
How can an except block be defined to capture specific exceptions?
runtime exception such as ValueError can be specified in the except statem
runtime exception, such as ValueError, can be specified in the try state
By omitting the except statement.
It is not possible to capture specific exceptions.
19
Which of the following is not a legal variable name?
all of the above
first lap
1st_lap
else
20
Given that some_var has the string "Whatever" in it, what does print(some_var[1]) display?
h
Whatever
W
r
21
A text file consists of
an unordered collection of lines.
a sequence of lines.
one continuous line.
one continuous line.
22
What is the purpose of curly braces inside an f-string?
dictionary
defines an imaginary number
includes a variable name for string interpolation
defines an imaginary number
23
How can you read an entire file at once into a list?
By using the readlines() command.
By using the readIntoList() command.
By using the readline() command.
By using the read() command.
24
Dictionaries are created using
parentheses
square brackets
curly braces.
any of these
25
How can a value be returned by a function?
Values can only be passed to a function, not returned
By assigning a value to one or more of the parameters
By using the return statement with the value to be returned
By assigning a value to a variable as the last line of code in the functio
26
What indicates that a class definition is complete?
The classEnd statement.
The defEnd statement.
Nothing. Class definitions never end.
The first line of code that is not indented.
27
When a line is written to a text file
a trailing line break is not allowed.
it is automatically deleted from memory.
a trailing line break must be included.
it cannot be saved because text files cannot be written.
28
What happens if you try to access a value in the dictionary using a key that does not exist?
The nearest match is returned.
The user is prompted for another key.
The None data type is returned.
An exception is thrown
29
Which of the methods below is a destructor?
__destructor__(self)
destructor(self)
__del__(self)
__init(self)__
30
What are global variables?
Global variables are variables that are accessed at the main program level.
Global variables are variables in which values are stored
Global variables are variable appear between the parentheses of a function
Global variables are variables that appear between the parentheses
31
What does split() do?
split() concatenates many slices into a single string.
split() exits the program.
split() slices a string into many pieces.
split() loops through a string until all characters are processed.
32
What can you do to prevent run-time exceptions from crashing your program?
Implement try/except blocks anywhere a runtime exception might be possible.
Perform code reviews to identify logic errors.
Make sure that all syntax errors have been eliminated.
Nothing. Runitme exceptions will always crash your program.
33
When using a docstring with a function
embed the docstring in the header comments.
include the docstring immediately before the function return statement.
include the docstring at the top of the module.
include the docstring immediately after the function definition statement.
34
How are values added to a dictionary?
By using the concatenation operator.
By using square brackets, a key and the assignment operator.
By using the append() method
Values cannot be added to a dictionary, because dictionaries are immutable.
35
Which of the following statements are true about functions?
User defined functions are a requirement of every Python program
All of the above
Programmers cannot write their own functions
Functions are a means to re-use code
36
A class is
An instance of an object
A simple data type
A prototype of an object that contains attributes and methods
A polymorphic function
37
What does the format specifier '{:20}' do for the display of a string value?
the field should be at least 20 characters wide and left justified
it adds 20 to the data value
it displays 20 consecutive colons
it repeats the value 20 times
38
What determines which lines of code belong to a while loop?
The lines of code beneath the while statement that are indented.
Comments preceding the loop.
Comments within the while loop block.
Curly braces immediately before and after the lines of code.
39
How is user input provided to the program?
returned by the input() function and stored in a variable
it is not possible for the user to provide input to a program
via a form on the Python web site.
through the prompt message passed as a parameter to the input function
40
In a Python program, how do you convert data entered at the keyboard into a floating point number?
Use the float() function.
Just enter numbers on the keyboard and be sure to include a decimal point.
Use the int() function.
Divide by 10.
41
When is the destructor method of an object called?
When the program first runs.
When a syntax error occurs.
When the maximum allowed number of instances has been exceeded.
When an instance is deleted.
42
What makes a tuple different than a list?
A tuple cannot be indexed.
A tuple is immutable whereas a list is not.
A tuple is mutable whereas a list is not.
Lists and tuples are identical.
43
What does '==' mean?
cannot be equal to
is greater than
is equal to
is less than
44
When is a while loop the most appropriate choice when code in your program needs to be repeated?
When the loop needs to run only once.
When the loop needs to run a fixed number of times.
When the number of times the loop needs to run is known in advance.
When the number of times the loop needs to run is not known in advance.
45
An item in a dictionary is described as a(an)
key-value pair
object
sequence
aberation
46
Data is represented in computer memory as
symbols
ones and zeros
characters and numbers
ones, zeros, letters and special characters
47
How can an entire text file be read into a string?
By using the stringMe() command.
By using the seek() command.
It is not possible to do so. Files must be read one line at a time.
by using the read() command with no parameters.
48
What should you do after you are done reading or writing the file?
Store the file contents in memory.
Nothing. Kick back and relax.
Close the file.
Verify the file integrity.
49
What identifies the start of a format specifier inside the curly braces of an f-string?
parentheses
a colon
a comma
a number
50
What are the guidelines for choosing a function name?
Follow the same guidelines used for constant names
Separate each word in the name with a space
Follow the same rules and best practices used for variable names
Use all capital letters
51
What does '<' mean?
is greater than
is less than
go to the left
is equal to
52
What symbol is used to create a comment in Python?
->>>
$
%
#
53
What is a for loop?
for loop enables a program to repeat a block of code one time
The for loop enables a program to repeat a block of code multiple times.
The for loop is a block of code included at the beginning
The for loop enables a program to repeat a block of code multiple times.
54
What does 'num > 5' test for?
the value in num is greater than 5
the value in num should be greater than 5
the value in num is greater than or equal to 5
num will be set to 5
55
The int() function is an example of a
built-in function
library function
alternate function
user defined function
56
Indents in Python code
are used strictly to make the code easier to read
don't matter
matter
aren't allowed
57
What does print(some_var.upper()) display?
the string contained in some_var in all upper case characters
the integers in some_var
the highest value characters in some_var
the upper case letters in some_var
58
Which of the following statements calls the constuctor method for the Rectangle class?
myRectangle = Rectangle()
constructor(self) = Rectangle()
myRectangle = constructor(self).Rectangle
myRectangle = Rectangle().constructor(self)
59
Which of the following is not a legal variable name?
two_much
tw0much
2much
tw0much
60
A condition in an if-statement can evaluate to what possible conditions?
any number of values
0, 1 and 2
either True or False
good, fair, serious or fatal
61
How can elements in a list be sorted?
By using the list sort() method.
By using the list reverse() method.
The order of elements within a list does not matter.
By using the list reorder() method.
62
What can happen if you don't indent your code properly in Python?
The code will be ignored.
You will receive an email from python.org
It might make the code harder to read but the program will run the same.
Your code may run but produce unexpected results.
63
What is the name of the function used to display text to the user?
print()
int()
display()
show()
64
After a function calculates a value, how does it return that value to main program where it was called?
By using the print() function
Since function variables are destroyed when the function call is completed
By storing the value in a local variable.
By including that value in a return statement.
65
What happens if the condition in a while statement is False?
The while loop exits.
Control jumps to the break statement.
The while loop runs again.
The while loop is entered.
66
String methods are
ways to name string variables
obsolete
a numerical data type
"like functions, but associated with a particular string"
67
An object is
An instance of simple data
An instance of a class
An instance of a procedure
A polymorphic function
68
What list method deletes an element from a list and returns its value?
The pop() list method.
The whatIs() list method.
The remove() list method.
The del statement.
69
Where in a program should a function be defined?
Near the top of the program
Immediately after the first call to the function
Functions do not have to be defined to be used
At the very end
70
What data type does the input() function return?
output
integer
it depends upon the input entered
string
71
Which of the following statements is true about functions?
User defined functions are a requirement of every Python program
None of the above
Functions are not a means of re-using code
Programmers cannot write their own functions
72
In other programming languages, the dictionary data structure is referred to as a(an)
all of these
associative array
hash
hash table
73
Which of the following variable names does not follow best practices.
none of the above
counter
length
Width
74
What does the 'and' Boolean operator do?
It compares two conditions. Only if both are True is the result True
It compares two conditions. If at least one is True, the result is True
It flips the value of a condition from True to False or False to True
It compares two conditions. If one but not both of the conditions is True,
75
What data type is used for text characters?
float
derivative
integer
string
76
What is one way in which a hacker can compromise a system via a programming application?
By ignoring anti-virus updates.
By using an infected thumb drive.
Programming applications cannot be used to compromise a system.
Cause the appication to crash by entering invalid input.
77
What is a logic error?
an error in which the program runs but behaves in an unexpected manner
an error that is detected by Python
an error produced by a missing parenthesis
an error in which the computer incorrectly evaluates a condition to be True
78
Which of the following data types may be values in a dictionary?
a string
a floating point number
an integer
any of these
79
What does the strip method do?
strip() removes unwanted comments.
strip() adds a strip of border characters to a string.
strip() removes code bloat.
strip() removes unwanted characters from the beginning and end of a string.
80
How are instance attributes within an object's method referenced?
by using method name and dot notation before the name of the instance
by using 'self' with dot notation before the instance variable's name.
by specifiying the instance variable's name.
by specifying the name of the class and the instance variable.
81
What does the '>' symbol do in a string format specifier?
it causes the text value to be displayed center justified
it causes the text value to be displayed right justified
it causes the text value to be ignored
it causes the text value to be displayed left justified
82
How many times does a for loop run?
value of the for loop variable defines the number of times a for loop run
A for loop runs a random number of times.
A for loop runs once for each item in the sequence included in the for
A for loop runs once.
83
Which technique for reading a file is the most appropriate when working with very large text files?
Open and close the file many times, reading a small portion
Read one line at a time in a for loop.
Read the entire file into a list with the readlines() command.
Read all at once with the read() command.
84
If "Please enter a value: " appears within the parentheses of an input function, what happens?
the program terminates
the program is compiled
"Please enter a value” is displayed to the user as a prompt
the program is compiled
85
What does int(g) mean?
int makes the value of g intermittent
int converts the value in g from a string to a whole number.
int computes the compounded interest rate of g.
int is a mathematical function that performs integration
86
What happens when a function is called?
All of the above.
Program execution jumps to the function definition executes the code
The function is defined.
The function is deleted.
87
What are local variables?
Local variables are variables that have many stops.
Local variables are variables that do not appear inside functions.
local variables are variables in which values are stored within a function.
ocal variables are variables in which values are stored within a function.
88
What is a string?
a sequence of text characters
a set of commands executed in a branch of an if statement
a thread of floating point numbers
a sequence of integers
89
Which symbol is used as the string concatenation operator?
=
~
+
%
90
How can you read a text file one line at a time?
By specifying "o" as the mode parameter in the open() command.
By using the read() command with no parameters.
By using the singleLine() string method.
By using the file object variable as the sequence in a for loop command.
91
What does 'num >= 5' test for?
the value in num should be greater than 5
num will be set to 5
the value in num is greater than 5
the value in num is greater than or equal to 5
92
Header comments
Are not allowed
Often provide useful information about the author of the program
Cannot be viewed via IDLE
Are frowned upon by most organizations
93
Assuming break statements are not used, what has to happen for a while loop to exit?
The sequence has to terminate.
The while loop condition must become False.
The continue statement must be used.
The while loop condition must become True.
94
In Python, which of the following symbols is used for modulo?
x
%
+
/
95
What does the statement 'guess == 5' do?
tests for inequality, resulting in True when guess is not equal to 5
if guess is not equal to 5, it assigns 5 to guess.
tests for equality, resulting in True when guess is equal to 5
assigns the value 5 to guess
96
How is the body of a function defined?
By indenting the lines of code immediately following the 'def' statement
By surrounding the code immediately
The body of a function must be registered at python.org
By placing the code between the 'def' and 'end' statements
97
How does Python know which code needs to be executed on the true path of an if/else statement?
All the code that is indented under the 'else' is in the true path
The line of code immediately following the 'if' statement,
All the code indented following both the 'if' and 'else' lines
All the code that is indented under the 'if' and before the 'else'
98
Within a Python class, what is 'self'?
'self' identifies the author of the program.
'self' is an identifier for a particular instance of a class.
'self' identifies attributes for the class as a whole.
'self' makes the class private to the application.
99
When is the constructor for an instance of a class called?
when the instance() function is called.
when the append() method of the class is called.
when an instance of the class is instantiated.
when the append() function is called.
100
What function is used to get user input in Python3?
input()
format()
raw_input()
print()
101
What is true about the parameters of a function?
The order in which the parameters are defined matters.
Parameters have no order.
Parameters can be passed to a function in any order.
Functions can have only one parameter.
102
Where should the initial condition for a while loop be set?
As the first line of code inside the while loop block.
After the while loop block.
In the comments at the top of the program file.
The initial condition needs to be set up before the while loop statement.
103
What does the for statement do at the beginning of each iteration of the loop?
It queries the user for instructions.
It evaluates the condition of the for loop variable.
takes the next item in the sequence and stores it in the for loop variable
It ends the loop.
104
What happens if your program does not catch an exception?
The try/except block in the program gracefully recovers from the exception
The system catches the exception and the program terminates immediately
Programs cannot catch acceptions
Program execution proceeds normally
105
Which of the following variable names would follow best practices for a constant?
absolute_width
MinimumWidth
67
MAX_WIDTH
106
In a Python program, how do you convert data entered at the keyboard into a whole number?
Use the find_number() function.
Divide by 10.
Use the int() function.
Just enter numbers on the keyboard.
107
Where is the official documentation for the Python language found?
There is no official documentation for Python.
The Library of Congress
python.org
stackoverflow.com
108
After a line is read from a text file, what is the file position?
The end of the file.
Arbitrary.
The beginning of the file.
The next line in the file to be read.
109
What does 'num = 5' do?
tests for num to be equal to 5
sets the value of num to 5
tests for num to be greater than 5
the value in num should be greater than 5
110
How can you determine if a key exists in the dictionary?
By checking the values in the dictionary.
By using the in operator to test for existence of the key.
By searching the Python Consortium database.
It is not possible to determine if a key exists.
111
How are values in a dictionary accessed?
The nearest match is returned.
By putting the key inside square brackets, like a list.
By using the access() method.
By putting the key inside curly braces.
112
Thonny can best be described as
Informational Dialog Learning Environment for Python
Institutional Design Level Enterprise
an Integrated Development Environment for Python
the International Developers Longitudinal Enclave
113
Which of the following is an example of a sequence that might be used in a for statement?
An integer
A floating point number
A boolean variable
A list
114
The Python split method can be used to
access the key of a dictionary
join variables into a line of text
separate values in a string into individual variables
remove white space from the start and end of a string

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