Reading And Writing Files

Exercise: Reading And Writing Files

How can you read and print the contents of a binary file named "binary.dat"?

with open("binary.dat", "rb") as file:
    print(file.read())

print_binary_content("binary.dat")

with open("binary.dat", "r") as file:
    print(file.read())

with open("binary.dat", "rb") as file:
    print(file.readlines())

Answer: A

Using open() in binary read mode to read and print the binary content.

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What does the file.is_closed attribute check for?

Checks if the file is open for reading

Checks if the file is a binary file

Checks if the file is a text file

Checks if the file is closed

Answer: D

file.is_closed checks if the file is closed.

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How can you write a dictionary to a JSON file named "data.json"?

with open("data.json", "w") as file:
    json.dump(my_dict, file)

write_json("data.json", my_dict)

with open("data.json", "w") as file:
    file.write(json.dumps(my_dict))

write_to_json("data.json", my_dict)

Answer: A

Using json.dump() to write a dictionary to a JSON file.

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What is the purpose of the file.mode attribute?

Represents the file's modification time

Represents the file's size in bytes

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

Represents the file's encoding (character set)

Answer: C

file.mode represents the file's access mode.

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How can you check if a file named "output.txt" is writable?

if is_writable("output.txt"):

if file.can_write("output.txt"):

if os.access("output.txt", os.W_OK):

if check_writable("output.txt"):

Answer: C

Using os.access() with the os.W_OK flag to check if the file is writable.

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