ExamAdept

How can you read and print the lines with odd line numbers from a file named "numbers.txt"?

A:

with open("numbers.txt", "r") as file:
    lines = file.readlines()
    for i in range(len(lines)):
        if i % 2 != 0:
            print(lines[i])

B:

print_odd_lines("numbers.txt")

C:

with open("numbers.txt", "r") as file:
    print(file.read(2))

D:

with open("numbers.txt", "r") as file:
    for line in file:
        if line.number() % 2 != 0:
            print(line)

Answer: A

Using the index to identify odd line numbers and printing corresponding lines.

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What does the os.path.join() function do?

A:

Joins two paths into a single path

B:

Checks if a path is a regular file

C:

Returns the base name of a file or directory

D:

Moves a file to a different directory

Answer: A

os.path.join() joins two paths into a single path.

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

A:

shutil.move("source.txt", "destination.txt")

B:

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

C:

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

D:

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

Answer: C

Using a context manager to open both files and writing the content of "source.txt" to "destination.txt".

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How can you read and print the lines from a file named "book.txt" in reverse order?

A:

with open("book.txt", "r") as file:
    lines = file.readlines()
    for line in reversed(lines):
        print(line)

B:

print_reverse_lines("book.txt")

C:

with open("book.txt", "r") as file:
    print(file.read()[::-1])

D:

with open("book.txt", "r") as file:
    lines = file.readlines()
    for line in lines.reverse():
        print(line)

Answer: A

Using reversed() to iterate through lines in reverse order.

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What does the os.path.splitext() function return?

A:

Returns the file's extension

B:

Returns the file's base name

C:

Returns the file's absolute path

D:

Returns the file's creation time

Answer: A

os.path.splitext() returns the file's extension.

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Questions for: Reading And Writing Files