Meta Software Engineer Coding & Algorithms Interview Questions
Practice 212 real Coding & Algorithms interview questions for Software Engineer roles at Meta.
"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"
"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"
"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."
"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."
"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."
"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."
"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."
"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."
"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."
"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."
"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."
"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."
"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."
"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."
"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."
Implement merge-in-place and group cyclic-equivalent strings
You are given two ascending arrays to merge in place and a separate grouping task: Part A — In-place merge without known sizes: - Array A contains sor...
Design an O(1) recency-evicting cache
Design and implement a fixed-capacity in-memory cache that supports get(key) and put(key, value) in average O( 1) time. When capacity is exceeded, evi...
Merge two interval lists into a union
You are given two lists of closed intervals [start, end]. Each list is individually sorted by start and contains non-overlapping intervals. Merge the ...
Find shortest path and compare BFS vs DFS
Given an unweighted graph (directed or undirected), explain how to find the shortest path between two nodes without writing code. Describe the algorit...
Navigate unknown grid to locate target
You control a mouse in an unknown 2D maze. You do not know the maze dimensions or your absolute coordinates. The interface exposes move() → bool (atte...
Compute top-N outgoing spenders
Add a feature to report the top N accounts by total outgoing payments across both immediate pays and scheduled payments. Implement: List<String> topNS...
Guide a mouse to find cheese with APIs
You are controlling a mouse in an unknown 2D grid maze. Some cells are blocked (walls), some are open, and at most one open cell contains a piece of c...
Implement tree column grouping and minimal parentheses fixes
Part A — Binary tree column grouping: Given the root of a binary tree, group node values by their vertical columns from leftmost to rightmost using x-...
Solve array merge and tree flattening problems
1) Given two sorted arrays, merge them into a single sorted array. Provide both an in-place approach (when the first array has enough trailing capacit...
Maintain top N payers
Implement topNPayers(n) that returns the n accounts with the highest cumulative outgoing payment amounts as strings formatted "{accountId}:{totalOutgo...
Find the k-th largest element
Problem Given an integer array nums and an integer k, return the k-th largest element in the array. Notes: - “k-th largest” means the element that wou...
Group a tree by vertical columns
Given the root of a binary tree, produce a vertical listing of nodes: assign each node an x-coordinate (root at x=0; left child x−1; right child x+ 1)...
Check near-palindrome with one deletion
Given a string s, determine whether it can become a palindrome after deleting at most one character. Return both the boolean result and one valid inde...
Design structure for top-K frequent elements
You are working with a large collection of items represented by integer IDs (e.g., product IDs, user IDs, etc.). Updates and queries arrive over time....
Solve UTF-8 Validation & Shortest Path
Question LeetCode 393. UTF-8 Validation LeetCode 1091. Shortest Path in Binary Matrix https://leetcode.com/problems/utf-8-validation/description/ http...
Compute unmatched parentheses length
Problem You are given a string s consisting only of characters '(' and ')'. Repeatedly remove any matched pair of parentheses as part of a valid paren...
Solve island connectivity and string multiplication
Question Given N distinct islands (e.g., a, b, c…) and a list of existing undirected paths between them, compute the minimum number of additional path...
Solve diverse LeetCode algorithm problems
Question LeetCode 695. Max Area of Island LeetCode 380. Insert Delete GetRandom O( 1) LeetCode 19. Remove Nth Node From End of List LeetCode 1004. Max...
Design weighted random index picker
Design and implement a data structure that, given an array of positive integer weights w[0..n−1], supports pick() that returns index i with probabilit...
Add two binary strings
You are given two binary strings a and b (each consisting only of characters '0' and '1'). Return their sum as a binary string. Input - a: string, len...