Section 1
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True/False: The integrity of a program's output is only as good as the integrity of its input. For this reason the program should discard input that is invalid and prompt the user to enter correct data.
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Section 1
(50 cards)
True/False: The integrity of a program's output is only as good as the integrity of its input. For this reason the program should discard input that is invalid and prompt the user to enter correct data.
True
True/False: Both of the following for clauses would generate the same number of loop iterations. for num in range(4): for num in range(1,5):
True
True/False: Nested decision structures are one way to test more than one condition.
True
The Python library functions that are built into the Python ________ can be used by simply calling the function.
interpreter
If value1 is 2.0 and value2 is 12, what is the output of the following command? print(value1 * value2)
24.0
True/False: Computer programs typically perform three steps: Input is received, some process is performed on the input, and output is produced.
True
In Python, the ________ symbol is used as the not-equal-to operator.
!=
What type of loop structure repeats the code based on the value of the Boolean expression?
condition-controlled loop
What is the result of the following Boolean expression, if x equals 5, y equals 3, and z equals 8? x < y or z > x
True
True/False: When using the camelCase naming convention, the first word of the variable name is written in lowercase letters and the first character of the second and subsequent words are written in uppercase letters.
True
What does the following expression mean? x <= y
x is less than or equal to y
True/False: Functions can be called from statements in the body of a loop, and loops can be called from the body of a function.
False
A(n) ________ variable is created inside a function.
local
What is the result of the following Boolean expression, if x equals 5, y equals 3, and z equals 8? not ( x < y or z > x) and y < z
False
True/False: An action in a single alternative decision structure is performed only when the condition is true.
True
What are the values that the variable num contains through the iterations of the following for loop? for num in range(2, 9, 2):
2,4,6,8
What type of loop structure repeats the code a specific number of times?
count-controlled loop
True/False: The Python language is not sensitive to block structuring of code.
False
True/False: Python formats all floating-point numbers to two decimal places when outputting using the print statement.
False
True/False: Python allows programmers to break a statement into multiple lines.
True
True/False: In Python, math expressions are evaluated from left to right, no matter what the operators are. Selected Answer
False
After the execution of the following statement, the variable sold will reference the numeric literal value as a(n) ________ data type: sold = 256.752
Float
What is the disadvantage of coding in one long sequence structure?
If parts of the duplicated code have to be corrected, the correction has to be made many times.
A Boolean variable can reference one of two values: ________.
true or false
True/False: The function header marks the beginning of the function definition.
True
True/False: Comments in Python begin with the # character.
True
True/False: Python allows you to compare strings, but it is not case sensitive.
False
True/False: In flowcharting, the decision structure and the repetition structure both use the diamond symbol to represent the condition that is tested.
True
True/False: A local variable can be accessed from anywhere in the program.
false
True/False: In Python, an infinite loop usually occurs when the computer accesses the wrong memory address.
False
What is the structure that causes a statement or a set of statements to execute repeatedly?
repitition
What is the output of the following print statement? print('The path is D:\\sample\\test.')
The path is D:\sample\test
True/False: The \t escape character causes the output to skip over to the next horizontal tab.
True
What is not an example of an augmented assignment operator?
<=
The variable used to keep the running total is called a(n) ________.
accumulator
Which mode specifier will erase the contents of a file if it already exists and create it if it does not exist?
'w'
In a print statement, you can set the ________ argument to a space or empty string to stop the output from advancing to a new line.
end
True/False: In Python, print statements written on separate lines do not necessarily output on separate lines.
True
What is the informal language that programmers use to create models of programs that have no syntax rules and are not meant to be compiled or executed?
psuedocode
A ________ variable is accessible to all the functions in a program file
global
In Python the ________ symbol is used as the equality operator
==
Python comes with ________ functions that have been already prewritten for the programmer.
standard
True/False: Boolean functions are useful for simplifying complex conditions that are tested in decision and repetition structures.
True
True/False: A better way to repeatedly perform an operation is to write the statements for the task once, and then place the statements in a loop that will repeat the statements as many times as necessary.
True
A(n) ________ is a diagram that graphically depicts the steps that take place in a program.
flowchart
A variable's ________ is the part of a program in which the variable may be accessed.
scope
When will the following loop terminate? while keep_on_going != 999:
When keep_on_going refers to a value equal to 999
True/False: When function A calls function B, which in turn calls function A, it is known as indirect recursion.
True
True/False: In a nested loop, the inner loop goes through all of its iterations for every single iteration of an outer loop.
True
After the execution of the following statement, the variable price will reference the value ________. price = int(68.549)
68
Section 2
(50 cards)
True/False: In Python, one can have a list of variables on the left side of the assignment operator
true
When a file has been opened using the 'r' mode specifier, which method will return the file's contents as a string?
read
In a dictionary, you use a(n) ________ to locate a specific value.
key
True/False: Python function names follow the same rules for naming variables.
true
What defines the depth of recursion?
the number of times the function calls itself
True/False: Different functions can have local variables with the same names
true
A(n) ________ is any piece of data that is passed into a function when the function is called
argument
Given the following function definition, what would the statement print(magic(5)) display? def magic(num): return num + 2 * 10
25
What would you use if an element is to be removed from a specific index?
del statement
True/False: One of the reasons not to use global variables is that it makes a program hard to debug.
true
True/False: A function definition specifies what a function does and causes the function to execute.
false
What would be the result of the following code? ages = {'Aaron': 6, 'Kelly': 3, 'Abigail': 1} value = ages['Brianna']
KeyError
What does the following statement mean? num1, num2 = get_num()
The function get_num() is expected to return a value each for num1 and num2.
What makes it easier to reuse the same code in more than one program?
modules
Which method would you use to return the value associated with a specified key and remove that key-value pair from the dictionary?
pop
True/False: Python allows for passing multiple arguments to a function.
True
What is the process used to convert an object to a stream of bytes that can be saved in a file?
pickling
What are the data items in the list called?
elements
True/False: A recursive function must have some way to control the number of times it repeats
true
What is the value of the variable string after the execution of the following code? myString = 'abcd' myString = myString.upper()
'ABCD'
What method can be used to place an item in the list at a specific index?
insert
True/False: A problem can be solved with recursion if it can be broken into smaller problems that are identical in structure to the overall problem.
true
True/False: The hierarchy chart shows all the steps that are taken inside a function
false
True/False: Indexing starts at 1, so the index of the first element is 1, the index of the second element is 2, and so forth.
false
Which statement would you use to delete an existing key-value pair from a dictionary?
del
What would be the value of the variable list after the execution of the following code? list= [1, 2] list = list * 3
[1, 2, 1, 2, 1, 2]
What is a group of statements that exists within a program for the purpose of performing a specific task?
function
True/False: Lists are dynamic data structures such that items may be added to them or removed from them
true
Which list will be referenced by the variable number after the execution of the following code? number = range(0, 9, 2)
[0, 2, 4, 6, 8]
True/False: The sort method rearranges the elements of a list so they appear in ascending or descending order.
false
Assume that the customer file references a file object, and the file was opened using the 'w' mode specifier. How would you write the string 'Mary Smith' to the file?
customer.write('Mary Smith')
A value-returning function is ________.
a function that will return a value back to the part of the program that called it
A set of statements that belong together as a group and contribute to the function definition is known as a(n) ________.
block
True/False: The remove method removes all occurrences of the item from a list.
false
True/False: Unlike other languages, in Python, the number of values a function can return is limited to one
false
You created the following dictionary relationships = {'Jimmy':'brother'}. You then executed the following code, and received a KeyError exception. What is the reason for the exception? relationships['jimmy']
Jimmy and jimmy are different
In a value-returning function, the value of the expression that follows the keyword ________ will be sent back to the part of the program that called the function.
return
What method or operator can be used to concatenate lists?
+
What would be the value of the variable list2 after the execution of the following code? list1 = [1, 2, 3] list2 = list1 list1 = [4, 5, 6]
[1,2,3]
What is the result of the following statement? x = random.randint(5, 15) * 2
A random integer from 5 to 15, multiplied by 2, assigned to the variable x
A ________ constant is a global name that references a value that cannot be changed.
global
What statement can be used to handle some of the run-time errors in a program?
try/except statement
What method can be used to convert a list to a tuple?
tuple
A(n) ________ is a variable that receives an argument that is passed into a function
parameter
True/False: The randrange function returns a randomly selected value from a specific sequence of numbers.
true
The first line in the function definition is known as the function ________.
header
The Python standard library's ________ module contains numerous functions that can be used in mathematical calculations.
math
It is recommended that programmers should avoid using ________ variables in a program when possible
global
If the problem cannot be solved now, then a recursive function reduces it to a smaller but similar problem and ________.
calls itself to solve the smaller problem
What would be the value of the variable list2 after the execution of the following code? list1 = [1, 2, 3] list2 = [] for element in list1: list2.append(element) list1 = [4, 5, 6]
[1, 2, 3]
Section 3
(50 cards)
True/False: Using the radio buttons, the user can make multiple selections at one time.
false
Which widget will display multiple lines of text?
message
What will be assigned to the string variable even after the execution of the following code? special = '0123456789' even = special[0:10:2]
'02468'
The primary difference between a tuple and list is that ________.
once a tuple is created, it cannot be changed
Which method is automatically executed when an instance of the class is created in memory?
__init__
Which method would you use to determine whether a substring is present in a string?
find(substring)
True/False: The instances of a class share the data attributes in the class
false
Which list will be referenced by the variable list_string after the execution of the following code? list_string = '03/07/2008' list_string = list_string.split('/')
['03', '07', '2008']
True/False: The self parameter is required in every method of a class.
true
What attributes belong to a specific instance of the class?
instance
What types of programs are event-driven?
GUI programs
True/False: Python does not have GUI programming features built into the language itself.
true
What is the relationship called in which one object is a specialized version of another object?
is a
What method can be used to add a group of elements to a set?
update
What is another name for the accessor methods?
getters
What will be assigned to s_string after the execution of the following code? special = '1357 Country Ln.' s_string = special[ :4]
'1357'
What is, conceptually, a self-contained unit that consists of data attributes and methods that operate on the data attributes?
object
True/False: A list cannot be passed as an argument to a function.
false
Which widget will create a rectangular area that can be used to display graphics?
canvas
What is the correct structure for creating a dictionary of month names to be accessed by month numbers?
{ 1 : 'January', 2 : 'February', 3 : 'March' }
True/False: A class might be thought of as a 'blueprint' that an object may be created from.
true
Which widget will create an area that displays one line of text or an image?
label
________ allow(s) a new class to inherit the members of the class it extends.
Inheritance
in order to avoid KeyError exceptions, you can check whether a key is in the dictionary using the ________ operator.
in
True/False: Check buttons are displayed in groups and used to make mutually exclusive selections.
false
In which environment can a user determine the order in which things happen?
GUI
What is the value of the variable string after the execution of the following code? string = 'Hello' string += ' world'
'Hello world'
What concept involves a superclass and a subclass?
inheritance
What are the valid indexes for the string 'New York'?
0 through 7
What gives a program the ability to call the correct method depending on the type of object that is used to call it?
polymorphism
What would be the value of the variable list after the execution of the following code? list = [1, 2, 3, 4] list[3] = 10
[1, 2, 3, 10]
What is the number of the first index in a dictionary?
Dictionary is not indexed by number
True/False: A mutator method has no control over the way that a class's data attributes are modified.
false
True/False: An object is a stand-alone program but is used by programs that need its service.
false
Which function would you use to get the number of elements in a dictionary?
len
True/False: Programs that use tkinter do not always run reliably under IDLE.
true
What is another name for the mutator methods?
setters
When a method is called, what does Python make to reference the specific object on which the method is supposed to operate?
self parameter
Which section in the UML holds the list of the class's methods?
third
When there are several classes that have many common data attributes, it is better to write a(n) ________ to hold all the general data.
superclass
True/False: The pack method determines where a widget should be positioned.
true
What will be assigned to s_string after the execution of the following code? special = '1357 Country Ln.' s_string = special[4: ]
'Country Ln.'
When working with multiple sets of data, one would typically use a ________.
nested list
What is the value of the variable phones after the execution of the following code? phones = {'John': '555555', 'Julie': '7777777'} phones['John'] = '1234567'
{'John': '1234567', 'Julie' : '7777777'}
Which widget allows the user to select a value by moving a slider along a track?
scale
What will be assigned to the string variable pattern after the execution of the following code? i = 3 pattern = 'z' (5 i)
'zzzzzzzzzzzzzzz'
Which section in the UML holds the list of the class's data attributes?
second
What does a subclass inherit from a superclass?
attributes and methods
True/False: A superclass inherits attributes and methods from its subclasses without any of them having to be rewritten.
false
What method can be used to convert a tuple to a list?
list
Section 4
(20 cards)