Q. What will open('data.txt', 'x') do if data.txt already exists?
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(A)
Open the file for reading
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(B)
Append to the file
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(C)
Raise an error
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(D)
Overwrite the file
✅ Correct Answer: (C)
Raise an error
Explanation: The 'x' mode raises a FileExistsError if the file already exists.