Deck 7: files and Exceptions

Question 1

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?

A) customer_file.write('Mary Smith')
B) customer.write('w','Mary Smith')
C) customer.input('Mary Smith')
D) customer.write('Mary Smith')

Answer 1

D

Question 2

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

A) exception statement
B) try statement
C) try/except statement
D) exception handler statement

Answer 2

C
t/false

Question 3

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

A) Retrieving data
B) Reading data
C) Input data
D) Get data

Answer 3

B

Question 4

How many types of files are there?

A) One
B) Two
C) Three
D) four

Question 5

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

Question 6

Python allows the programmer to work with text and number files.

Question 7

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

A) Open the file.
B) Read the file.
C) Process the file.
D) Close the file.

Question 8

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

A) estrip
B) rstrip
C) strip
D) remove

Question 9

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

A) filename
B) Extension
C) file object
D) file variable

Question 10

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.

Question 11

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

A) 'w'
B) 'r'
C) 'a'
D) 'e'

Question 12

A(n) _____ access file is also known as a direct access file.

A) sequential
B) random
C) numbered
D) text

Question 13

Closing a file disconnects the communication between the file and the program.

Question 14

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

Question 15

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

A) 'w'
B) 'r'
C) 'a'
D) 'e'

Question 16

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

A) Sequential
B) Random
C) Number
D) Text

Question 17

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

A) str
B) value
C) num
D) chr

Question 18

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

A) Data is copied from a variable in RAM to a file.
B) Data is copied from a variable in the program to a file.
C) Data is copied from the program to a file.
D) Data is copied from a file object to a file.

Question 19

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

A) read
B) getline
C) input
D) readline

Question 20

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

A) write
B) input
C) get
D) read

Question 21

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

Question 22

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

Question 23

A(n) _______________ file contains data that has not been converted to text.

Question 24

It is possible to create a while loop that determines when the end of a file has been reache

Question 25

A(n) _______________ access file retrieves data from the beginning of the file to the end of the file.

Question 26

The term _______________ file is used to describe a file from which the program gets data.

Question 27

When a program needs to save data for later use, it writes the data in a(n) _______________.

Question 28

A(n) _______________ gives information regarding the line number(s) that caused an exception.

Question 29

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

Question 30

Programmers usually refer to the process of _______________ data in a file as "writing data to" the file.

Question 31

A(n) _______________ includes one or more statements that can potentially raise an exception.

Question 32

A(n) _______________ file contains data that has been encoded as text, using a scheme such as ASCII.

Question 33

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

Question 34

The term _______________ file is used to describe a file to which data is written.

Question 35

A filename _______________ is a short sequence of characters that appear at the end of a filename preceded by a period.