With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: All the obsolete 8-bit encodings are used in the communication protocols and text-exchange data formats much less often than in the past, having been mostly replaced with UTF-8. A number of encoding conversion applications were developed. "iconv" is an example that is supported by most versions of Linux, Macintosh and some other operating systems; but converters are rarely needed unless accessing texts created more than a few years ago.
text_B: If I am making a file in a text-exchange data format, is the file likely using an 8-bit text encoding?
NO.