Three rounds, on campus interview. First round was aptitude, more of puzzle and logic design questions. Next two rounds were face-to-face interviews. Third round was basically an extension to second round. Hiring manager asked me questions based on my previous round answers. Few approaches were not correct and I was asked to tackle it in better/efficient way.

Basic digital design, clock domain crossing ,fifo for analog prepare rc circuit. keep your basic clear and dont try to make interviewer fool. Approach to problem is checked rather than answers.