Question

Which of the file modes in the following is invalid for a text-file?

• A. a
• B. w
• C. r
• D. ab

Hint:

In Python, file modes like 'a', 'w', and 'r' are for text files, while 'b' is added for binary files (e.g., 'ab' or 'rb').

Answer 1

The Correct Option is D

In Python, the "a" mode opens a file for appending, and "w" mode opens a file for writing. "r" is for reading. The "ab" mode is valid only for binary files, not for text files. Therefore, the correct answer is "ab" for text files.