Module 11 Quiz

Question 1

What does the "r" mode do when opening a file?

Writes to the file Opens the file for reading Appends to the file Creates a new file

Question 2

What happens if you open a file with "w" mode and the file already exists?

The existing content is erased and replaced New content is added to the end Python raises an error Nothing happens

Question 3

What does file.read() return?

The first line of the file A list of all lines The entire file contents as a single string The file object itself

Question 4

What is the main advantage of using the with statement for file handling?

It makes files read faster It allows reading and writing at the same time It creates backup copies of files It automatically closes the file, even if an error occurs

Question 5

What does file.readlines() return?

A single string with all content A list where each element is a line from the file The first line of the file The number of lines in the file

Question 6

Which mode should you use to add data to the end of an existing file without erasing it?

"a" "w" "r" "x"

Question 7

Why do we use line.strip() when reading lines from a file?

To convert the line to uppercase To split the line into words To remove the trailing newline character To count the characters in the line

Question 8

What does CSV stand for?

Computer Stored Values Comma-Separated Values Coded String Variables Column-Sorted Variables

Question 9

What is the advantage of csv.DictReader over csv.reader?

It reads files faster It can read larger files It automatically converts numbers You can access values by column name instead of index

Question 10

When writing a CSV file, why should you include newline="" in the open() call?

To prevent extra blank lines between rows on Windows To make the file smaller To add headers automatically It is required for all file operations

Question 11

What does the write() method return?

True if successful The file object The number of characters written None

Question 12

What happens if you try to open a non-existent file with "r" mode?

Python creates an empty file Python raises a FileNotFoundError Python returns None Python returns an empty string