How to answer 'What are your strengths?' in an interview

Why would an interviewer ask the question 'What are your strengths?'

I mean who would possibly say 'I dont have any' or 'How the hell should I know?' or who would not want to try and use this question to impress?

Thats exactly what this question is for.

How to answer the question 'Tell me about yourself'

 Every Interview Question seeks to find out / draw out/ bring to the fore some trait or the other. The interviewer uses a number of questions to get a 360 degree view of the candidate (YOU) and make up his/her mind on the following: