Meta Interview Questions
Practice 1,169 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."
Estimate ads ranking revenue impact
You are the data scientist for an ads ranking team. The team has built a new ranking algorithm for feed ads. The new model changes the ordering of ads...
Solve Two Backtracking Array Problems
You will solve two independent coding problems. For each problem, first discuss edge cases, then implement a correct solution, and finally explain how...
Design Search And Web Crawling Systems
Design the following two large-scale systems. 1. Social-network search: Design a Facebook-like search product that lets users search for people, pages...
Design an Instagram-Style Social Feed
Design an Instagram-style social media system. Functional requirements: - Users can create posts containing media and captions. - Users can follow oth...
Measure scheduled posts feature success
Facebook is considering launching a new feature that allows users to schedule a post to be published at a future time. The product hypothesis is that ...
Solve Tree Columns And Maze Variants
Answer the following coding tasks from the interview. 1. Binary-tree column grouping: Given the root of a binary tree, group node values by vertical c...
Explain Collaboration, Ambiguity, and Prioritization
Answer the following behavioral interview prompts using concrete examples from past projects: 1. Describe a time you collaborated with other people on...
Write SQL for reply-based recipient metrics
You work on a social product and are given two tables. Assumptions (use these unless you state otherwise): - All timestamps are in UTC. - A “reply” is...
Count unconnected posts and reactions
You are analyzing a newly launched feed feature intended to improve engagement by showing more unconnected content. Assume the following tables: - pos...
Design an Online Game Leaderboard
Design the backend system for an online game's leaderboard. The system should support: - Recording player scores from game sessions. - Showing a globa...
Design Top-K, Crawler, and Chess Systems
During a senior software engineering virtual onsite, you are asked three independent traditional system design prompts. For each prompt, clarify requi...
Solve a Key-Door Corridor Maze
AI-assisted coding round. You may use an AI coding assistant, but you are responsible for debugging the implementation and validating the test cases. ...
Describe Using AI at Work
Describe how you have used AI tools in your day-to-day work. In your answer, explain the business or engineering problem, how AI helped, what safeguar...
Troubleshoot a production server outage
You are the on-call engineer responsible for a production server for the next several days. Discuss how you would approach the following: - How would ...
Prevent Private Code Leakage in Coding Agents
Meta trains or fine-tunes coding agents using private source-code repositories. These agents may later be used to answer coding questions, generate co...
Design an On-Demand Delivery Platform
Design an on-demand local delivery marketplace for restaurants or grocery stores. The platform should support customers browsing merchants, building s...
Simulate Monster Team Battles
Design and implement a battle simulator. Data model: - Team: a team name and an ordered list of monsters. - Monster: a monster name, a type, current h...
Design an Online Judge and Live Comments
The onsite included two system design prompts: 1. Design an online judge platform where users submit code for programming problems. The system must su...
Design an Instagram-like Media Feed
Design an Instagram-like photo and video sharing service. Core requirements: - Users can create accounts, follow and unfollow other users, and view pr...
Design an online auction system
Design a scalable online auction service. Users can: - Create an auction (item info, start/end time, reserve price optional). - Place bids while the a...