Before the interview, course material was shared so that preparation could be done based on it. The questions were very specific to that material. All questions asked in the interview were simple but required intelligence to improve the solutions. This means it's about the perspective of thinking about the best solution, and the interviewers were looking for such solutions. I feel this is a great way to learn and think about any problem, rather than jumping on a quick fix.

Algorithms and complexity questions, and some mathematics related.