I could talk about this question for hours. You probably wouldn't want me building an autonomous robot or drone unless it was covered in pillows and safely cont

I could talk about this question for hours. You probably wouldn't want me building an autonomous robot or drone unless it was covered in pillows and safely contained far away from children and combustible liquids. Does this make you unhireable? No, not if you're upfront about it - "I haven't done much networking." OK, well given your work history I'm sure I could buy you a book or two and you'd be able to pick it up with no problems. That said, if the job was for a network engineer, you might not be at the top of the list. Or maybe you would be, who knows? I think a GOOD interviewer wouldn't pass you over because of one question. Am I unhireable as a drone engineer because I'd have to look up some basics of computer vision, control systems or other domain-specific stuff? No, probably not - I've done very well in a lot of different technical roles and I have a strong background in mathematics. That said, if you and I were up for the same job, I wouldn't be holding my breath for an offer letter. Nobody can know everything about anything. Smart interviewers understand that. People who don't aren't people you want to work with anyways.