Written test 1 (Total 25 qns): Questions were on diodes (even on Zener diodes), and DAC, to find equivalent resistance across the terminals(star and delta), some network theory problems with dependent sources, digital electronics, RC circuits, and the waveforms for the same, opamp circuits(basic electronics). And last 5 questions were on simple aptitude: no of sides, ratio, reasoning... Written test 2 (only 5 questions): Here, the way you approached the problem matters and the steps involved in it. It was quite easy compared to 1st test. Problems: equivalent resistance, dependent source, RC circuit - waveform, diode.