ProgFund1 Exam 2

Which of the following functions returns the largest integer that is less than or equal to x?

floor

What is a group of statements that exists within a program for the purpose of performing a specific task?

function

A ________ variable is accessible to all the functions in a program file.

global

It is recommended that programmers should avoid using ________ variables in a program when possible.

global

A(n) ________ chart is also known as a structured chart.

hierarchy

In a menu-driven program, what statement is used to determine and carry out the user's desired action?

if-elif-else

Which of the following statements causes the interpreter to load the contents of the random module into memory?

import random

The ________ argument specifies which parameter the argument should be passed into.

keyword

A(n) ________ variable is created inside a function.

local

Which method could be used to convert a numeric value to a string?

str

What statement can be used to handle some of the run-time errors in a program?

try/except statement

How many types of files are there?

two

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

What type of function can be used to determine whether a number is even or odd?

Boolean

What happens when a piece of data is written to a file?

Correct Data is copied from a variable in RAM to a file.

True/False: A function definition specifies what a function does and causes the function to execute.

False

True/False: A local variable can be accessed from anywhere in the program.

False

True/False: If a file with the specified name already exists when the file is opened, and the file is opened in 'w' mode, then an alert will appear on the screen.

False

True/False: In Python, there is no restriction on the name of a module file.

False

True/False: In Python, there is nothing that can be done if the program tries to access a file to read that does not exist.

False

True/False: In a menu-driven program, a loop structure is used to determine the menu item the user selected.

False

True/False: One of the drawbacks of a modularized program is that the only structure we could use is sequence structure.

False

True/False: Python allows the programmer to work with text and number files.

False

True/False: The hierarchy chart shows all the steps that are taken inside a function.

False

True/False: The value assigned to a global constant can be changed in the mainline logic.

False

True/False: Unlike other languages, in Python, the number of values a function can return is limited to one.

False

True/False: When a piece of data is read from a file, it is copied from the file into the program.

False

What makes it easier to reuse the same code in more than one program?

Modules

Which step creates a connection between a file and a program?

Open the file.

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.

True/False: A value-returning function is like a simple function except that when it finishes it returns a value back to the called part of the program.

True

True/False: An exception handler is a piece of code that is written using the try/except statement.

True

True/False: Boolean functions are useful for simplifying complex conditions that are tested in decision and repetition structures.

True

True/False: Closing a file disconnects the communication between the file and the program.

True

True/False: Different functions can have local variables with the same names.

True

True/False: If the last line in a file is not terminated with a \n, the readline method will return the line without a \n.

True

True/False: In Python, one can have a list of variables on the left side of the assignment operator.

True

True/False: It is possible to create a while loop that determines when the end of a file has been reached.

True

True/False: One of the reasons not to use global variables is that it makes a program hard to debug.

True

True/False: Python allows for passing multiple arguments to a function.

True

True/False: Python function names follow the same rules for naming variables.

True

True/False: Strings can be written directly to a file with the write method, but numbers must be converted to strings before they can be written.

True

True/False: The ZeroDivisionError exception is raised when the program attempts to perform a division by zero.

True

True/False: The function header marks the beginning of the function definition.

True

True/False: The math function, ceil(x), returns the smallest integer that is greater than or equal to x.

True

True/False: The randrange function returns a randomly selected value from a specific sequence of numbers.

True

True/False: To assign a value to a global variable in a function, the global variable must first be declared in the function.

True

A value-returning function is ________.

a function that will return a value back to the part of the program that called it

A(n) ________ is any piece of data that is passed into a function when the function is called.

argument

A set of statements that belong together as a group and contribute to the function definition is known as a(n) ________.

block

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')

When a function is called by its name, then it is ________.

executed

True/False: The math function, atan(x), returns one tangent of x in radians.

false

Which of these is associated with a specific file and provides a way for the program to work with that file?

file object

What type of value is returned by the functions random and uniform?

float

A ________ constant is a global name that references a value that cannot be changed.

global

The first line in the function definition is known as the function ________.

header

The Python library functions that are built into the Python ________ can be used by simply calling the function.

interpreter

The Python standard library's ________ module contains numerous functions that can be used in mathematical calculations.

math

Which of the following will assign a random number in the range of 1 through 50 to the variable number?

number =random.randint(1, 50)

A ________ access file is also known as a direct access file.

random

What type of file access jumps directly to any piece of data in a file without reading the data that came before it?

random

When a file has been opened using the 'r' mode specifier, which method will return the file's contents as a string?

read

What do you call the process of retrieving data from a file?

reading data

Which method will return an empty string when it has attempted to read beyond the end of a file?

readline

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

Which method could be used to strip specific characters from the end of a string?

rstrip

A variable's ________ is the part of a program in which the variable may be accessed.

scope

The ________ of a local variable is the function in which the variable is created.

scope

Python comes with ________ functions that have been already prewritten for the programmer.

standard

The ________ design technique can be used to break down an algorithm into functions.

top-down

A(n) ________ is a variable that receives an argument that is passed into a function.

parameter

Which mode specifier will open a file but will not let you change the file or write to it?

'r'

Which mode specifier will erase the contents of a file if it already exists and create it if it does not exist?

'w'

Given the following function definition, what would the statement print magic(5) display? def magic (num): return num+2*10

25