Meta interview notes, page 158 of 238

“I had a decent story ready but fumbled the impact part.” The rest of the author's notes on Data Scientist interview at Meta, Onsite - Behavioral / Leadership round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.

“The tricky part is that the longest path doesn't have to go through the root, which is easy to forget under pressure.” The rest of the author's notes on Software Engineer interview at Meta, Technical Phone Screen round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.

“This is the foundation everything else builds on so you really cannot rush it.” The rest of the author's notes on Software Engineer interview at Meta, Online Assessment (OA) round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.

“I went straight to visitor numbers and kind of regretted it.” The rest of the author's notes on Product Manager interview at Meta, Onsite - Product Sense / Strategy round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.

“The core idea is a 2D prefix sum table built once at construction time, O(R*C), and then each query runs in O(1) using inclusion-exclusion on the four corners.” The rest of the author's notes on Software Engineer interview at Meta, Onsite - Coding / Algorithms round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.

“Knew the brute force immediately but sat there second-guessing whether to just code it up or explain the optimal path first.” The rest of the author's notes on Software Engineer interview at Meta, Technical Phone Screen round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.

“The naive approach is obviously too slow so you need to count occurrences of each string first, then walk through every possible split of accesscode and multiply the prefix count by the suffix count.” The rest of the author's notes on Software Engineer interview at Meta, Onsite - Coding / Algorithms round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.

“Stack-based solution, pretty much what you'd expect.” The rest of the author's notes on Software Engineer interview at Meta, Technical Phone Screen round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.

“My first instinct was brute force, nested loops, O(n²), and I actually said that out loud which I think was fine.” The rest of the author's notes on Data Scientist interview at Meta, Technical Phone Screen round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.

“I went straight for prefix sums and binary search, which is fine, but they pushed on why not the alias method.” The rest of the author's notes on Software Engineer interview at Meta, Onsite - System Design / Architecture round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.