Meta Software Engineer - Intern interview questions

Reached out recruiter on campus career fair. Got campus interview and later on-site interview. Since I had another pending offer deadline before the on-site interview date, they rescheduled the on-site interview via phone (which is a pity). The on campus interview (45min) only had one question on whiteboard I made it smoothly. The phone interview, however had two questions in 45min. I spent 30 mins on the first one and didn't finished the second question, but the interviewer was super nice! He gave me some hints on the second one and discussed with me about the question when I knew I already ran out of time. He even answered my question patiently. I had a pending offer deadline and requested a quick feedback, and two days later I got the offer! That was awesome since I didn't expect to get it at first.