What does \x00 mean in binary file?

An ASCII file might be read or interpreted as having NULL-terminated strings, carriage returns & line-feeds, or other control characters, that are intended to be read and acted on. For example, a text reader might look for a line of text, where a line is “however many characters you see before you get to a linefeed”

A binary file is considered to be just a sequence of bytes – none of them has any special meaning, in the sens that a text-reader would interpret them.

\x00 is an example of a specific byte value (HEX 0), that might be interpreted in a special way by a text reader.

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