You can face moments when your work will be criticized but you have to remember that only those who work can make mistakes. The main purpose of this question is to see your attitude when you are criticized and how you deal with it. If you face this question and you have been in a situation where your work was criticized, tell a bit about it and then tell the interviewer the way you dealt with it - if you think that there can be a better approach to what you are doing, evaluate it and accept it. The most important thing is to remember that you do not lose your cool on hearing negative remarks about yourself.