Texas Instruments Design Engineer interview questions

I had applied for a position in TI Bangalore through an employee referral. The interview date & time was set as per my convenience. The interviewers were very cordial & supportive. They started with RLC circuits. 1) Drew 3/4 different RC circuits and asked questions about the input to output waveforms. 2) Drew an actual regulator circuit with a cap connected between output and resistor divider feedback point and asked what is the function of this cap. 3) 2/3 Different types of MOS based amplifier circuits and asked their gain. o/p impedance, advantage of one wrt other. 2 weeks later when I inquired about the result of the interview process, I was told that I have been rejected.