In general, how much detail is it acceptable to divulge when talking about your accomplishments at your previous places of employment during an interview with a prospective employer?
In engineering interviews, it's common to be asked about technical details of the projects you have worked on (at least where I live). I understand that this is to assess my technical ability. In general, what is a good guideline on how much detail you can get into without violating your obligation of confidentiality to your previous employer(s)?
My problem is, you talk very little and this can be mistaken for ineptitude. You talk too much and you risk violating your ethical obligation to your current employer.
(Of course, a more acceptable solution is for you to pick another project where you have no obligation for confidentiality. But, granted any such project you worked on is below your current level of skills, what should you do?)