"Hex(adecimal)" is not an encoding scheme, it's a number basis. "Binary 00000" as a number is just zero, which is written equivalently as "0", "00"... in hexade

"Hex(adecimal)" is not an encoding scheme, it's a number basis. "Binary 00000" as a number is just zero, which is written equivalently as "0", "00"... in hexadecimal. This is different from a chunk of data consisting of six bits that all happen to be zero. And indeed, you need to decide on how to convey that, and simply saying "hex" - or "binary" or "decimal" for that matter - is not enough, that is correct.