National Instruments Field Applications Engineer interview questions

They contacted me through a head hunting company, so I had a couple of interviews in that company (grupal and psychological tests interviews) after that, They called me to arrange a phone interview with an engineer of the company (technical interview) during it i got stuck looking the answer of some questions but the guy gave me some tips in order to find the solution. Finally I had an interview with the area manager and other engineers from the area.

I got a phone interview from National Instrument HR in Taiwan. She asked me some me background question and future career planning. I was invited to the on-site interview yesterday. There were an English test and professional test at the beginning. And then, there was a group interview where everyone needs to give a brief introduction about himself. After that, it is 1:1 interview with the hiring manager.