Microsoft Software Engineer - Internship interview questions

It was a one day interview consistung of two rounds,both were technical.In the first round they asked me a question which was to remove duplicates from array,they asked me to write pseudocode and also asked about edge cases and also asked me what can be the sample test cases.

The interviewer was a former alumni and asked technical questions. Also asked me to describe the projects i mentioned on my resume. asked me to code my answers on a whiteboard and psuedo code was ok.