Microsoft Software Engineer Internship interview questions

After doing an on-campus interview which lasted for 30 minutes, I got an invitation to attend an interview in Microsoft headquarters in Seattle. During the Seattle interview, there were 4 back-to-back interviews where the third one was a lunch interview and the last interview was with the manager of the team that I was assigned. 3 of the interviews asked data structure questions and one of them asked an object-oriented design question.