LeetCode
Experience
·
Apr 2019
·
USA
Facebook | Phone screen | Serialize and deserialize binary tree
3 upvotes
1,020 views
2 replies
Interview Experience
Status: New Grad Given the root to a binary tree, serialize to a List<Integer and deserialize back to the original tree. Easy question that can run in O(N) time/space. I mentioned using...
Full Details
🔒
Unlock full leaked content
Full insider details, leaked discussions, and candidate experiences.
Get Premium →Topics
Binary Tree
Queue
Recursion
Stack
More from Meta
Reddit
Leetcode is cooked in 2026 and we don't hire people who only grind leetcode.
Reddit
Returning to SWE work after 3 years of cancer treatment
Reddit
2026 New Grad Recap
Reddit
Most likely failed meta phone screen
Reddit
Targeting OpenAI SWE Roles? Insights on what to expect from recent system design loops