I think it's a question that invites some degree of self-assessment and justification - gives you a chance to see how some people think about themselves. I also

I think it's a question that invites some degree of self-assessment and justification - gives you a chance to see how some people think about themselves. I also think you could get the same sort of result in the no case by asking something like 'How would you assess the areas you could improve as a programmer?'