TikTok Software Engineer interview questions

Applied through official website. The first two rounds were pleasant, each including a self intro, simple resume related questions, followed by two lc medium problems about graph/dfs/bfs. The interviewers were polite and nice. The hm round was not as pleasant... It felt like he asked weird behavior questions. The coding problem was about tree—not hard, but the question itself was unclear and needed clarification.

The OA had two problems: one required implementing BFS, likely involving graph traversal, shortest path, or level-order processing. The other was related to binary trees, possibly dealing with traversal, recursion, or tree modifications like lowest common ancestor or subtree calculations. Both were quite challenging, requiring efficient algorithms and strong problem-solving skills.