I had an interview on my school campus and made it to the final round of interviews on Microsoft's campus. You sit in a room with about 20 other candidates and do about 5 interviews with different interviewers. After your interviews, you receive free lunch, free sweatshirts, and free taxi vouchers.

Questions weren't too hard, and I thought I did really well. However, apparently, I didn't stand out enough among the hundreds of people they were interviewing that day.

Reverse a string.

Write an algorithm to figure out who the winner of a tic-tac-toe board was.

Addition using linked lists (each node holds one digit).