Synthesized from 23 candidate submissions for ALL.
Facebook's interview process is highly standardized, prioritizing rapid algorithmic problem-solving with a heavy emphasis on time/space complexity analysis and clear, confident communication. Candidates are expected to handle coding challenges efficiently, often being asked multiple problems in a single session, while higher-level roles require deep dives into system design trade-offs and real-world edge case handling.
The candidate participated in a multi-round interview process at Facebook, including screening, technical, design, and behavioural rounds. The candidate was rejected, potentially due to not solving one of the coding problems in the first onsite round.
Two coding questions were asked. The first involved calculating a moving average. The second required finding the nearest island from a starting point using BFS.
Two coding problems were solved. The first involved populating next right pointers in each node of a binary tree using a queue. The second required finding the union of two lists of non-overlapping, sorted intervals.
Two coding problems were solved. The first involved printing a linked list backward. The second required finding the minimum number of knight moves to reach a target position.
A system design round focused on designing a streaming service for registered users, similar to Netflix.
Two coding problems were solved. The first involved finding the Kth largest element in an array using a heap. The second required cloning a graph using DFS.
A behavioural round focused on project discussions and behavioural questions.
The candidate advanced to virtual onsite rounds after the screening round.
The candidate participated in a Facebook screening round with two questions. The first was a binary search problem, which the candidate solved along with the code. The second was initially perceived as a dynamic programming problem, but the interviewer requested a linear solution instead.
Binary search problem (solved with code)
A problem initially approached as a dynamic programming problem, but the interviewer requested a linear solution instead
Interview Digest