Xiaomi Software Engineer interview questions

Fine, a nice company to work in. Xiaomi designs, develops, and sells smartphones, mobile apps, laptops and series of related consumer electronics. One interview asked some basic technical skills, and ask one algorithm question, let me explain how to do it and write down the code.

Firstly the interviewer ask me to interview myself. Secondly the interviewer let me chose my perfect project to show my skills. After he ask me some algorithm problem, like the difference between memcpy and strcpy?