When this question is asked, its is important that you 
brief yourself in less than a para.

To begin with it is relevent that you begin with you 
education as graduation or PG and then start with briefing 
about your first work experience to the latest. The company 
name, your designation and in brief what your roles and 
responsibilities were in that profile.
Then berief about you family background.

This question is normally asked to get and inside of you to 
know what have you worked as and your family background.