ExamAdept

How can you read and print the last 3 lines from a file named "data.txt"?

A:

with open("data.txt", "r") as file:
    lines = file.readlines()
    print(lines[-3:])

B:

print_last_lines("data.txt", 3)

C:

with open("data.txt", "r") as file:
    print(file.read(-3))

D:

with open("data.txt", "r") as file:
    for line in file:
        print(line[-3:])

Answer: A

Using lines[-3:] to get the last 3 lines from the list of lines.

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What does the file.writelines() method do?

A:

Writes a single line to the file

B:

Writes multiple lines to the file from a list

C:

Writes the entire content of another file

D:

Writes a specific number of characters to the file

Answer: B

file.writelines() writes multiple lines to the file from a list.

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How can you write a list of strings to a text file named "output.txt" in Python, with each string on a new line?

A:

with open("output.txt", "w") as file:
    strings = ["Hello", "World", "Python"]
    file.write("\n".join(strings))

B:

write_lines("output.txt", ["Hello", "World", "Python"])

C:

text.write("output.txt", ["Hello", "World", "Python"])

D:

with open("output.txt", "w") as file:
    file.writelines(["Hello", "World", "Python"])

Answer: A

Using "\n".join(strings) to join the strings with newline characters.

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

A:

Returns the absolute path of the current working directory

B:

Returns the relative path of the specified file

C:

Returns the absolute path of the specified file

D:

Checks if a file exists in the current directory

Answer: A

os.path.abspath() returns the absolute path of the current working directory.

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How can you read and print the first 5 characters from a file named "sample.txt"?

A:

with open("sample.txt", "r") as file:
    print(file.read(5))

B:

print_first_characters("sample.txt", 5)

C:

with open("sample.txt", "r") as file:
    print(file.readline(5))

D:

with open("sample.txt", "r") as file:
    print(file.read(1, 5))

Answer: A

Using file.read(5) to read the first 5 characters.

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Questions for: Reading And Writing Files