TikTok Software Engineer interview questions

Contacted by a recruiter and scheduled a virtual on-site interview. I know I didn't do well for that interview because I could not answer some questions about a project I did 3 years ago. Then I was ghosted about two or three weeks and got a rejection letter.

first start with introduction, and then ask a lot about cpp knowledge, database index, briefly go through my projects, and one varint of leetcode style coding problem, and Q&A finally