Texas Instruments Analog Applications Associate interview questions

1st written round consisting of 2 parts-aptitude & technical..... aptitude was quite,no need to prepare for that... analog part was bit conceptual..mostly questions based on RC,RL transients...capacitor charge sharing,frequency response of filters,diode & zener applications i qualified for 2 rounds of interview..1st round was easy answered almost 80% of questions.. 2nd round was analog genius round...they would mostly puzzle you on opamp circuits & waveform sketching given some circuit configuration... i wasn't able to clear that round