Which of the following describes what happens when a piece of data is written to a file quizlet?
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What will be the output after the following code is executed and the user enters 75 and 0 at the first two prompts? Show def main(): try: total = int(input("Enter total cost of items? ")) num_items = int(input("Number of items ")) average = total / num_items except ZeroDivisionError: print('ERROR: cannot have 0 items') except ValueError: print('ERROR: number of items cannot be negative') main() What will be the output after the following code is executed and the user enters 75 and 0 at the first two prompts? def main(): try: total = int(input("Enter total cost of items? ")) num_items = int(input("Number of items ")) average = total / num_items except ZeroDivisionError: print('ERROR: cannot have 0 items') except ValueError: print('ERROR: number of items cannot be negative') main() What will be the output after the following code is executed and the user enters 75 and 0 at the first two prompts? def main(): try: total = int(input("Enter total cost of items? ")) num_items = int(input("Number of items ")) average = total / num_items except ZeroDivisionError: print('ERROR: cannot have 0 items') except ValueError: print('ERROR: number of items cannot be negative') main() What will be the output after the following code is executed and the user enters 75 and 0 at the first two prompts? def main(): try: total = int(input("Enter total cost of items? ")) num_items = int(input("Number of items ")) average = total / num_items except ZeroDivisionError: print('ERROR: cannot have 0 items') except ValueError: print('ERROR: number of items cannot be negative') main() What will be the output after the following code is executed and the user enters 75 and 0 at the first two prompts? def main(): try: total = int(input("Enter total cost of items? ")) num_items = int(input("Number of items ")) average = total / num_items except ZeroDivisionError: print('ERROR: cannot have 0 items') except ValueError: print('ERROR: number of items cannot be negative') main() Upgrade to remove ads Only SGD 41.99/year
Terms in this set (31)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 When a piece of data is read from a file it is copied from the file into the program. False Closing a file disconnects the communication between the file and the program. True In Python there is nothing that can be done if the program tries to access a file to read that does not exist True Python allows the programmer to work with text and number files. False Strings can be written directly to a file with the write method but numbers must be converted to strings before the can be written. True It is possible to create a while loop that determines when the end of a file has been reached. True If the last line in a file is not terminated with /n the readline method will return the line without /n. True Which of the following is associated with a specific file and provides a way for the program to work with that file? the file object What is the process of retrieving data from a file called? reading data Which of the following describes what happens when a piece of data is written to a file? The data is copied from a variable in RAM to a file. Which step creates a connection between a file and a program? open the file How many types of files are there? two A(n)________ access file is also known as a direct access file. Random Access file Which type of file access jumps directly to a piece of data in the file without having to read all the data that comes before it? Random
A single piece of data within a record is called a Field Which mode specifier will erase the contents of a file if it already exists and create the file if it does not already exist? 'w' Which mode specifier will open a file but not let you change the file or write to it? 'r' Which method could be used to convert a numeric value to a string? str Which method will return an empty string when it has attempted to read beyond the end of a file? read Given that the customer file references a file object, and the file was opened using the 'w' mode specifier how would you write the strong 'Mary Smith' to the file? customer.write('Mary Smith') When a file has been opened using the 'r' mode specifier ,which method will return the file's contents as a string? read Which of the following is the correct way to open a file named users.txt in 'r' mode? infile = open('users.txt', 'r') Which of the following is the correct way to open a file named users.txt to write it? outfile = open('users.txt', 'w') When a program needs to save data for later use, it writes the data in a(n)________ File When data is written to a file, it is described as a(n)_______ file. Output If data is retrieved from a file by a program, this is known by the term______ file. Read A(n) ________ file contains data that has been encoded as text using as scheme such as ASCII. Text A(n)______ access file retrieves data from the beginning of the file to the end of the file. Sequential A(n) _________ file contains data that has not been converted to text. Binary A filename________ is a short sequence of characters that appear at the end of a filename, preceded by a period. Extension Recommended textbook solutions
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What is the process of retrieving data from a file called quizlet?What is the process of retrieving data from a file? Known as reading data from the file.
What is the term used to describe a file that data is read from?What is the term used to describe a file that data is read from? Input file.
Is any piece of data that is passed into a function when the function is called?An argument is any piece of data that is passed into a function when the function is called. A parameter is a variable that receives an argument that is passed into a function.
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