ExamAdept

What is the purpose of the os.remove() function?

A:

To check if a file exists

B:

To remove a directory

C:

To delete a file

D:

To rename a file

Answer: C

The os.remove() function is used to delete a file in Python.

📖

How can you copy the contents of one file, "source.txt", to another file, "destination.txt"?

A:

copy_file("source.txt", "destination.txt")

B:

with open("destination.txt", "w") as dest:
    dest.write(open("source.txt").read())

C:

file_copy("source.txt", "destination.txt")

D:

copy_contents("source.txt", "destination.txt")

Answer: B

Opening both files and using write() to copy the contents from source to destination.

📖

What does the flush() method do when working with files?

A:

Writes the file contents to the console

B:

Clears the contents of the file

C:

Flushes the internal buffer, ensuring data is written to the file

D:

Closes the file

Answer: C

The flush() method ensures that any buffered data is written to the file.

📖

How can you read and print the first 3 lines of a file named "sample.txt"?

A:

lines = open("sample.txt").readlines()[:3]
    for line in lines:
    print(line)

B:

with open("sample.txt", "r") as file:
    for i in range(3):
        print(file.readline())

C:

contents = read_lines("sample.txt", 3)
print(contents)

D:

first_three_lines("sample.txt")

Answer: B

Using a for loop with readline() to read and print the first 3 lines.

📖

What happens if you open a file using the mode "a"?

A:

The file is opened for reading

B:

The file is opened for writing, starting from the beginning

C:

The file is opened for appending, starting from the end

D:

The file is opened for both reading and writing

Answer: C

The "a" mode opens the file for appending, and the file cursor is positioned at the end.

📖

Questions for: Reading And Writing Files