Meta Interview Questions
Practice 1,129 real Meta interview questions for 2026. Covers top categories — Coding & Algorithms, Analytics & Experimentation, Data Manipulation (SQL/Python), Behavioral & Leadership, and System Design — across Software Engineer, Data Scientist, Machine Learning Engineer, Data Engineer, and Product Manager roles. Real questions from actual interviews with detailed solutions. Expect a software-engineering-heavy loop: timed algorithmic coding (trees, arrays, graph/maze problems, delimiter/CSV parsing), system-design prompts like leaderboards, flight search and online-judge architectures, and an increasingly common AI-assisted coding round that mirrors real workflows. Data Scientist rounds emphasize product analytics and experimentation—designing tests, diagnosing spend drops and bots, evaluating unconnected content, and writing SQL for multi-account, seller, and vehicle metrics. Machine Learning Engineer questions skew toward recommender and ranking work (place and friend recommendation, sparse-matrix ops, linear-regression derivations, newsfeed dislike models). Data Engineers focus on data modeling, ETL, capacity calculations, reservations/utilization queries, and production SQL/Python tasks. For interview preparation, prioritize timed coding practice, system-design templates, rigorous SQL drills (joins/CTEs/aggregation), clear A/B-testing frameworks, and concise STAR behavioral stories tied to measurable impact.
"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."
Find missing ranges in interval
Given a sorted unique integer array nums and two integers lower and upper defining an inclusive interval [lower, upper], return all missing ranges not...
Solve permutation successor and evaluate expressions
Part A: Given a sequence of integers that forms a permutation, rearrange it in-place to produce the immediate next sequence in lexicographic order. If...
Design image and multimodal generation systems
System Design: Image Generation and Multimodal Generation Part 1 — End-to-End Image Generation System Design an end-to-end image generation system. Co...
Decide palindrome within k deletions
Given a string s and integer k, decide whether s can be transformed into a palindrome by deleting at most k characters. Provide an algorithm to comput...
Compute weighted sum of nested lists
Given a nested collection that can contain integers or other nested collections, compute the depth-weighted sum where each integer is multiplied by it...
Write SQL for multi-account metrics
A consumer app allows one user to own multiple accounts. Use SQL to answer the following questions. Assume the database has these tables: accounts - a...
Find Lowest Common Ancestor with Parents
Question LeetCode 1650. Lowest Common Ancestor of a Binary Tree III Compute the time and space complexity of your solution https://leetcode.com/proble...
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...
Calculate Posterior Fraud Probability Using Bayes' Theorem
Posterior Fraud Probability After a Flag Context You operate a fraud detection system that flags accounts as suspicious. Define: - F: account is fraud...
Design Machine Learning Model for Facebook Groups Post Ranking
ML System Design: Ranking Facebook Groups Posts in News Feed Scenario You are designing a machine-learning system to recommend posts from Facebook Gro...
Estimate Instagram Shopping Feature's Revenue and Test Impact
Instagram Shopping: Sizing, Experiment Design, and Troubleshooting Context Instagram is launching an in‑app shopping feature. You are asked to: - Esti...
Master Behavioral Interview Questions for Data/ML Roles
Behavioral & Leadership Interview (Data Scientist Onsite) Context You are preparing for an onsite behavioral interview for a Data Scientist role. Use ...
Convince PM to Implement Duplicate Observation Tool
Scenario Meta is considering building a Duplicate Observation Tool (DOT) to detect malicious copy‑cat content (e.g., re‑uploads of the same media or n...
Optimize Oculus Data Streaming with Bandwidth Constraints
Scenario Algorithmic screening for Meta VR/AR teams covering Oculus data streaming and geometric optimization. Question Oculus: Given an array frame_s...
Count three-digit numbers with distinct digits
Problem Given two integers left and right such that 100 ≤ left ≤ right ≤ 999, count how many three-digit integers x in the inclusive range [left, righ...
Design a weapon-sale ad detection system
Design an end-to-end ML system to detect and take action on ads/listings that attempt to sell weapons (or weapon-related prohibited items). Your syste...
Check carpool trip feasibility
You are given a list of trips where each trip i is (passengers_i, start_i, end_i) with start_i < end_i on a one-dimensional route. A single vehicle wi...
Design leaderboard and messenger systems
Question This Meta onsite system-design round asks you to design two large-scale systems back to back. Cover end-to-end architecture, APIs, data model...
Check diagonal equality in a matrix
Given an m x n integer matrix, determine whether every top-left to bottom-right diagonal contains identical values (all elements along each such diago...
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...