ExamAdept

How can you check if a file named "data.txt" exists in the current directory?

A:

if check_exists("data.txt"):

B:

if file.exists("data.txt"):

C:

if os.path.isfile("data.txt"):

D:

if is_file("data.txt"):

Answer: C

Using os.path.isfile() to check if the path refers to a regular file.

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What does the file.readline() method do?

A:

Reads the entire file content

B:

Reads a specific line from the file

C:

Reads the last line of the file

D:

Reads the next line from the file

Answer: D

file.readline() reads the next line from the file.

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How can you append the text "Additional content" to an existing file named "existing.txt"?

A:

with open("existing.txt", "a") as file:
    file.write("Additional content")

B:

append_text("existing.txt", "Additional content")

C:

with open("existing.txt", "w") as file:
    file.append("Additional content")

D:

with open("existing.txt", "a") as file:
    file.append("Additional content")

Answer: A

Using open() in append mode to add content to an existing file.

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How can you copy the contents of a file named "source.txt" to another file named "destination.txt" while preserving the original file's metadata?

A:

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

B:

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

C:

with open("destination.txt", "w") as dest:
    dest.write(open("source.txt").read())
    os.utime("destination.txt", os.path.getatime("source.txt"), os.path.getmtime("source.txt"))

D:

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

Answer: A

Using shutil.copy() to copy the file contents and preserve metadata.

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How can you read and print the lines containing only alphabetic characters from a file named "textfile.txt"?

A:

with open("textfile.txt", "r") as file:
    lines = file.readlines()
    for line in lines:
        if line.isalpha():
            print(line)

B:

print_alpha_lines("textfile.txt")

C:

with open("textfile.txt", "r") as file:
    print(file.read("[a-zA-Z]"))

D:

with open("textfile.txt", "r") as file:
    for line in file:
        if line.isalphabetic():
            print(line)

Answer: A

Using line.isalpha() to check if the line contains only alphabetic characters.

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Questions for: Reading And Writing Files