Meta Software Engineer Internship interview questions

I applied on Facebook website. A recruiter contacted me about 3-4 weeks later and scheduled an interview on campus, coming to our University. That was a technical interview where I had 2 problems based on Data Structures (Trees mainly) and bits manipulation. I passed the interview and I was scheduled for one more online. I was disappointed about the second interviewer, he didn't feel like really enjoying interviewing and also was doing something else during my interview for some part (about 10 minutes). He finished the interview quite shortly and I didn't pass to the next one.