I feel like in such a highly technical field it would be fairly easy to deliberately omit plenty of critical details without anyone noticing. It seems it would

I feel like in such a highly technical field it would be fairly easy to deliberately omit plenty of critical details without anyone noticing. It seems it would also be possible to make small additions to the system such that you would be the only person who really knows how things work. As long as you answer all of their questions you would certainly be meeting the good performance stipulation. There would be no way for them to know whether you are providing the whole story. Why offer up information that is not specifically requested? After all, the hardest part of engineering is knowing which questions to ask in the first place.