AlgoUniversity Software Engineer Internship interview questions

The interviewer seemed encouraging, and wanted to know me as a person. First gave my introduction, then we jumped straight into DSA. He gave me 1 question, standard 0/1 knapsack problem. First told the brute force would be exponential then wrote the tabulation of the code. Then we went to OS and OOPS, basic stuff like public keywords, mutex and deadlock. Then asked if I had any questions, and ended the interview. Around 20 minutes max.