[bravesoul2]

Of course "how did you learn how to do that?" could come from a place of curiosity! There is too much in the programming landscape for anyone to even scratch the surface with their life's work.

[breckinloggins]

When this question is asked in person, though, the tone is frequently one of “WHY do you know how to do that? It’s not your job”.

The difference is easily discernible. Online, though, I do interpret it more generously.