That’s a strange question. If by professional you mean by trade, then yes, many programmers don’t work with bits or type limits directly and could do fine witho

That’s a strange question. If by professional you mean by trade, then yes, many programmers don’t work with bits or type limits directly and could do fine without that knowledge. If by some sort of baseline certification (school, degree, etc) it’s hard to imagine that it’s not in an educational program, e.g. UTF-8 hints at it directly it the name. Can a programmer read a text file without knowing about UTF-8, at least as an enum-like parameter? Or know floating-point limitations, which every programmer should know, and not notice that float32 is 4 bytes wide? Or choose #rrggbb color never realizing that each 00..FF part stands for 2 hex / 8 bits? I think in reality it’s either a sign of a very narrow specialization, very low experience or just a complete lack of awareness. It’s like going through a forest for months and never noticing a fallen tree.