You should be confident on what you are saying. Be thorough on the topics you have mentioned in your resume or while introducing yourself. Be thorough on coding snippets and you should just have basic knowledge.

there were 3 rounds 1) online test consists of 40 questions and time given was 60 min (conducted on hirepro) - Technical questions are based on the department you belong. For EC we had questions from control system(finding transfer function) , circuit analysis, find the c code snippet to generate a particular graph, Digital Circuit, AEC. 2) technical interview 3) HR