Meta Developer interview questions

I am comign from an academic background and Meta was my 1st ever industry interview. I didn't know about Leetcode even. My linkedIn profile was picked up by the recruiter and i was scheduled an interview. I was expecting going through the resume and discussing about my experience but it was nothing like that. The interviwer came and asked me to share the screen. She wrote a problem which was some string manipulation. I froze, I have never coded with shared screen before. So, please practice a lot from Leetcode

No self-introduction; jump straight into coding. There are 2 questions in 45 minutes, about 20 minutes each with 5 minutes left for Q&A. Should come up with the optimized solution. Do a dry run with sample inputs, handle edge cases, and explain time/space complexity.