[tester756]

is close, yet no the same.

There's difference between "do you understand this if ladder" or "can you simplify this boolean expression"

and "clear bits 3, 25, 26, 27 of this register and set bits 25, 26, 27 to value 0b101"

I'm not saying that this is hard or something, just the 3rd thing is really rare unless you work close to hardware or some other specific tasks

[ivan_gammel]

I think the generalization skill that allows to go from one to another is essential. If someone has only some basic understanding of boolean expressions, but cannot apply this knowledge to binary numbers, this is a good characterization of their programming skills in general.