Meta Software Engineer (internship) interview questions

I applied through facebook's website. It took 3 weeks until they contacted me for the first time. The first interview was with HR on phone, and the second was also on phone, but at this time I needed to answer two technical questions. On the second interview I needed to answer the question by writing code on a platform they provided me by a web link. The questions was fair, but I didn't pass because I used the wrong method name for the data structure. Both interviewers were nice.

First describe yourself, then do the code work directly. The problem was not very difficult, but I spent too much time on it. As a result, I just answered one question.