first shortlisting was done based on a written test consisting of questions on aptitude, digital, analog electronics, C and signal systems, the section u'll be scoring highest marks will be your subject for initial interview you're not free to choose at least this happened in our college. Mine was digital so in the first round asked few common puzzles can be easily found on geeksforgeeks like find out the defected coin etc... then questions from number systems, mux basic digital were asked. after that they gave ckts to design like design ckts for finding the maximum and minimum at their respective positions and then use this as a black box to and design a ckt to sort 4 numbers ascending order then at last some numericals on setup and hold time

I applied through campus placement. The first round was an online test, followed by a coding round and finally interview. The interview lasted for 2 hours. First they asked some aptitude questions and they moved on to digital electronics covering number system, adders and mux etc. . Then questions about charging circuits were asked(RC).