ExamAdept

What does the file.isatty() method check for?

A:

Checks if the file is a text file

B:

Checks if the file is open for reading

C:

Checks if the file is a binary file

D:

Checks if the file is connected to a terminal device

Answer: D

file.isatty() checks if the file is connected to a terminal device.

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How can you read and print the lines containing the word "error" (case-insensitive) from a log file named "error.log"?

A:

with open("error.log", "r") as file:
    lines = file.readlines()
    for line in lines:
        if "error" in line.lower():
            print(line)

B:

print_error_lines("error.log")

C:

with open("error.log", "r") as file:
    print(file.read("error"))

D:

with open("error.log", "r") as file:
    for line in file:
        if "error".casefold() in line:
            print(line)

Answer: A

Using line.lower() to make the comparison case-insensitive.

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What does the file.mode attribute represent?

A:

Represents the file's size in bytes

B:

Represents the file's modification time

C:

Represents the file's access mode (read, write, etc.)

D:

Represents the file's creation time

Answer: C

file.mode represents the file's access mode.

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How can you read and print the lines containing at least three digits from a file named "text.txt"?

A:

with open("text.txt", "r") as file:
    lines = file.readlines()
    for line in lines:
        if sum(c.isdigit() for c in line) >= 3:
            print(line)

B:

print_lines_with_digits("text.txt", 3)

C:

with open("text.txt", "r") as file:
    print(file.read("\d{3,}"))

D:

with open("text.txt", "r") as file:
    for line in file:
        if line.count('\d') >= 3:
            print(line)

Answer: A

Using sum(c.isdigit() for c in line) to count digits in each line.

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What does the shutil.copy2() function do?

A:

Copies a file and preserves its metadata

B:

Copies a file and renames it

C:

Moves a file to a different directory

D:

Copies a directory and its contents

Answer: A

shutil.copy2() copies a file and preserves its metadata.

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Questions for: Reading And Writing Files