Meta Software Engineer Coding & Algorithms Interview Questions
Practice 218 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."
Validate word abbreviation and reconcile two abbreviations
Validate word abbreviation and reconcile two abbreviations Implement a function isValidAbbreviation(word: string, abbr: string) that returns true if a...
Choose the Cheapest Round Trip
Choose the Cheapest Round Trip You are given two arrays of equal length. departure[i] is the cost of departing on day i, and return_cost[j] is the cos...
Solve a Key-Door Corridor Maze
This question evaluates graph search and state-space reasoning by requiring shortest-path computation in a constrained one-dimensional maze with colle...
Solve Array Merge and Parentheses Cleanup
You are asked to solve two coding problems. Problem 1: Merge Three Sorted Arrays Given three integer arrays, each sorted in nondecreasing order, merge...
Solve Tree View and Triplet Sum
You are asked to solve two coding problems. Problem 1: Return the nodes visible from the right Given the root of a binary tree, return the values of t...
Solve Array, Matrix, and Recommendation Problems
During an onsite coding interview, solve the following independent tasks. Problem 1: In-place unique prefix You are given a nondecreasing integer arra...
Implement a Timestamped Banking System
This question evaluates the ability to design and implement an in-memory, time-ordered stateful system handling event scheduling, transactional update...
Infer an Unknown Alphabet Order
You are given a list of words that is already sorted according to an unknown alphabet. Derive one valid ordering of the characters in that alphabet. R...
Solve delimiter and CSV tasks
This question evaluates skills in string parsing and bracket balancing, CSV/file parsing and joining, computation of derived values, and sorting, emph...
Implement array parity and tree level views
This question evaluates proficiency in array frequency analysis and binary tree traversal, testing skills in data structures, correctness reasoning, a...
Solve Four Online Assessment Problems
Complete the following four independent coding tasks. For each task, write a function that returns the requested result. 1. Find the best value index ...
Solve array, tree, and maze problems
This question evaluates algorithmic problem-solving across arrays, binary trees, and grid pathfinding, testing competencies in array traversal and vis...
Implement an in-memory database with record locking
Implement an in-memory key–record database that supports basic CRUD on fields plus an exclusive lock per record. You are given a sequence of queries. ...
Merge Two Lists of Non-Overlapping Intervals
You are given two lists of closed integer intervals, a and b. Each interval is represented as a pair [start, end] with start <= end, and it covers eve...
Minimum Round-Trip Flight Cost
You are planning a round trip and want to spend as little as possible on flights. You are given two integer arrays of equal length n: - departure[i] —...
Maximum Length of a Word Selection With All Unique Characters
You are given an array of lowercase strings words. Select a subset of these words (zero or more, chosen in any order) and concatenate them. The select...
Construct a BST and read spiral order
The coding round reportedly included two algorithmic tasks: 1. Rebuild a binary search tree from a preorder sequence - You are given an array of di...
Check and infer custom alphabet
You are working with an unknown language that uses a custom alphabetical order, such as ['a', 'd', 'c', 'b', ...]. Implement the following: 1. Check s...
Find Kth Largest and Tree Ancestors
In a technical phone interview, the candidate was asked two coding problems in the same round: 1. K-th largest element in an array Given an unsor...
Solve Matrix, Tree, Nested, LCA, Maze Tasks
Answer the following independent coding tasks. For each task, implement a clean API, handle edge cases, and analyze time and space complexity. 1. Trav...