TikTok Software Engineer interview questions

This was a new grad process. I received an online assessment which I had to complete within 48hours. I received an email to schedule an interview 10 days after that. 3 rounds were supposed to be scheduled. For 1st round, I was asked 2 leetcode medium ques which I solved and I received an email to schedule for 2nd interview. In the 2nd interview, I was asked one coding question and then a follow-up to that question which I again solved. The worst part was after the interview the recruiter probably blocked me and I was trying to reach out to the recruiter for follow-up and my mail was not getting delivered and after few hours I received a generic email of rejection without any explanation. This is by far my worst interview experience.

Applied for graduate position online. Received Hackerrank coding test to be finished in 5 working days, the questions were quite difficult (similar as leetcode medium/hard). No reply after submitting the coding test