Multipolar Technology interview questions

The first interview was mostly about my personality, background and a little bit of my thesis. Also my knowledge about the position and technical skill required for the position. For example : "Can you tell us your background from you were born until now?", "why did you choose this topic as your thesis research?" "What do you know about Data analysis?" The second interviewer wa smostly about technical skill and knowledge "What do you know about Big Data? What tools do you use?"

What is your weakness and why?