ByteDance interview question

Coding questions include: Flip a binary tree, level order traversal, and one other 2-D DP question Other questions include: how raft works, how TCP works, TCP connection establishment/teardown, how TCP ensures reliable data transmission, difference between processes and threads, tell me something about epoll, have you heard of io_uring, DB isolation levels. If you have read relevant books such as CSAPP then you should be able to answer all of them