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Actually you know so much about yourself and you could talk for hours... But at the job interview you need to sort things out and say something relevant to the job you are applying for. The recruiter needs to know what you can do if they offer you the position.
If an interviewer asks you this type of question you have to know what to say. Unfortunately, most applicants do not prepare a clear answer to this question and talk the wrong way. Some applicants start reading their CV; others start talking about their home town and secondary school experience. Very few talk to the point. What is the point and why are you asked this question?
Learn more how to answer this question here...