Trilogy Innovations Software Engineer Internship interview questions

There were 3 questions asked and they were med to hard level. All the questions were from data structure. And all the questions were programming questions. One question was from graph and another two question were from the trees.

There were 3 Rounds in total. All were quite challenging and interesting. First and Second Rounds were related to projects and puzzles. Third Round was related to System Designing. I got an offer and I accepted it.