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Summary
I recently had a 45-minute phone screen interview with Meta for an SDE-2 role, which involved solving two Data Structures and Algorithms problems. I was selected for onsites.
Full Experience
I recently completed my phone screen interview for an SDE-2 role at Meta. The interview lasted 45 minutes and consisted of two challenging Data Structures and Algorithms problems, leaving very little time for overthinking.
I successfully navigated both problems and am pleased to share that I have been selected to proceed to the onsite rounds. I look forward to sharing my onsite experience soon.
Interview Questions (2)
Sliding Window Duplicate Check
Given an array of numbers nums and an integer K, determine if any subarray of exact length K contains duplicate elements.
Example:nums = [1, 2, 3, 4, 2, 5, 6], K = 4
Answer: true (subarray [2, 3, 4, 2] contains duplicates)
If K = 3
Answer: false
Binary Tree Custom Views
Given a binary tree, implement two specific view traversals:
1. Left View (Bottom-Up): Imagine standing on the left side of the tree and recording all visible nodes from the bottom up.
2. Right View (Top-Down): Imagine standing on the right side of the tree and recording all visible nodes from the top down.
The interviewer emphasized clarifying edge cases early on.
Preparation Tips
I found it crucial to use meaningful variable names, break down logic into small helper functions, and keep concerns separated (input parsing / core logic / output). Walking through test cases, including edge cases, was also important to demonstrate thoroughness.