You have to be careful while answering this question. Do not offer a weakness which will directly affect your selection but at the same time saying that you do not have any weakness will not be right too. Every human being has weaknesses, so it is perfectly OK for you to have some too.

The best way to answer this question will be to turn one of your strengths as a weakness and say that others accuse you of having this weakness but you think it is important to work in this manner. For e.g.: "My colleagues accuse me of paying to much attention to syntax but I believe it is important when you are writing the code to avoid spending too much time on finding and fixing the bugs later on."

Another way to answer this question is to offer a totally un-related weakness for e.g. "I have been staying alone for so many years now but I still can't cook independently."