Oracle MTS-1 interview questions

I had 3 interviews, 2 technical interviews each lasted around for 45 minutes with topics DSA, OOPs, Networks, Operating Systems etc. and last one technical + HR round which was for 30 minutes.

So Oracle came for on campus recruitment (tier1). Interview process consists of 4 rounds. 3 technical and 1 HR. In first the interviewer asked me about the projects I mentioned in my resume and easy-medium DSA question based on hashing. In second round some discussion on resume and then the classical maximum profit in stock prices and follow ups based on the number of transactions. In third round they asked me to design LRU cache and implementation of trie data structure. In HR round general HR questions.