My interview was a little bit different. I applied for digital domain initially for the written exam. After clearing the written exam I was sent into the Panel of logic design(there were three panels for three domains i.e. digital, embedded, analog) wherein he asked me some questions on logic design where i was unable to answer them completely. Therefore he gave me a choice to select one among three(C programming, aptitude, logic design) for the questions to be asked. I chose aptitude. He gave me 5 puzzles in which I was able to crack 4 of them. Later I was sent to the Embedded panel where he drilled down on microprocessors. I was able to perform well there. This entire process took around 3 hours to complete. Overall it was a very good experience. They'll surely test you on your subject knowledge.