Microsoft Software Engineer internship interview questions

There were 3 rounds, all based on data structures and algorithms (interestingly no HR round). The problems were easy-medium. Although the last one required fair amount of knowledge of dynamic programming and bitmasking

The interview went well. All the questions asked on Tree data structure and 1 coding question was also from tree. Interviewer was quite friendly firstly we discussed the approach the solution then we he asked me to write the code from scratch.