Meta Machine Learning Engineer Interview Questions
Meta Machine Learning Engineer interview questions typically probe both algorithmic skill and practical ML judgment. At Meta you should expect a mix of coding (data structures and algorithms), applied ML and modeling questions, ML-system design, and behavioral/leadership rounds that focus on impact, collaboration, and product thinking. What’s distinctive is the emphasis on production-ready thinking: interviewers evaluate how you translate models into scalable systems, choose metrics, reason about data and bias, and trade off latency, cost, and reliability in real-world settings. Recent pilots also include AI-assisted coding components in some interviews, so being fluent with modern developer workflows can help. For interview preparation, prioritize three threads: sharpen algorithmic coding (medium-to-hard problems), deepen practical ML fundamentals (evaluation metrics, debugging, feature engineering, model degradation), and practice end-to-end ML system design at scale (data pipelines, monitoring, deployment). Prepare STAR stories that show ownership and cross-team impact, and rehearse clear, structured explanations of trade-offs. Expect a timed loop of 4–6 focused interviews and a hiring committee review, so consistent performance across rounds matters more than a single standout answer.

"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."
Solve Two String Problems
The interview included two coding questions: 1. Exactly one edit apart Given two strings s and t, determine whether they are exactly one edit apart...
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 Place Recommendation System
Design a machine learning system for a maps or local-discovery product that recommends places a user may want to visit. The system should provide pers...
Optimize a Fifteen-Sum Card Strategy
You are given a simulator for a card game with 36 cards: ranks 1 through 9 in four suits. The table starts with 16 random cards. A move removes any 3 ...
Design a Short-Video Recommendation System
Design an end-to-end recommendation system for a short-video feed product. The system serves a large user base and must choose and rank videos for eac...
Find Words Containing Other Words
Given a list of lowercase strings, return all words that contain at least one other distinct word from the same list as a contiguous substring. Exampl...
Design Nearby and Notification Ranking
Two machine learning system design prompts were mentioned: 1. Nearby place recommendation for a mobile user Design a real-time recommendation syste...
Solve Merge Lists and Vertical Traversal
Two coding tasks were mentioned for a 40-minute round: 1. Merge multiple sorted linked lists: You are given an array of k singly linked lists, where e...
Find a String Containing Another
Given a list of strings, determine whether any string in the list contains another string from the same list as a contiguous substring. Return one str...
Design an image copyright-violation detection system
Design an ML system that detects whether a user-uploaded image violates copyright. Requirements - Input: an image uploaded by a user (optionally with ...
Answer senior-level behavioral interview questions
You are interviewing for a senior individual contributor role (roughly IC6+). Prepare structured answers for the following behavioral prompts: 1) Walk...
Build a Friend Recommender
You are given a simple social-graph codebase where each user has only an id and a collection of current friends. Starting from existing functions and ...
Discuss Projects, Failures, and Growth
Prepare structured answers for the following behavioral prompts from an interview: - Describe the project you are most proud of. - What was the hardes...
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...
Find Maximum Unique-Character Subset
Given a list of words, choose a subset such that no character appears more than once across the entire chosen subset. Return one optimal subset, not j...
Solve Tree Views, Columns, and Calculator
The interview note referenced three separate coding tasks. Solve each task independently. Task 1: Binary tree side views Given the root of a binary tr...
Implement weighted random sampling with preprocessing
Weighted Random Sampling (with performance follow-up) You are given an array of positive weights w[0..n-1]. Implement a data structure that supports: ...
Debug and optimize a card-drawing strategy
You are given a simplified card game engine with unit tests. The game is played using a table of face-up cards; each card has an integer value. On eac...
Solve four OA string/array/matrix/graph tasks
You have 4 independent coding tasks. 1) Uppercase vs lowercase count difference Given a string s consisting of ASCII letters (and possibly other chara...
Compute the next lexicographic permutation
Problem Given an integer array nums representing a permutation of its elements, modify the array in-place to produce the next lexicographically greate...