Questions on MMU (hard), bit manipulations, LTE technologies, algorithm efficiencies. But they gave you time to analyze and never put you down if you gave the wrong answer. Questions on internship experience, questions on university projects.

Think loud. People here are more interested in your thinking process than the answer per se. Questions are always interlinked so the next question is based on your previous question's answer. Although they make it a point to test on basic skill set required for performing tasks