Meta Behavioral & Leadership 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.
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"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."
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Solve tree view and parentheses cleanup
Solve the following two algorithm problems. 1. Right-side view of a binary tree Given the root of a binary tree, return the values of the nodes that w...
Find balanced subarray and increasing tree path
You are given two coding problems. Problem 1: Longest balanced subarray (0/1) Given an integer array nums of length n where each element is either 0 o...
How would you compare Facebook vs Instagram Stories?
You work on short-form ephemeral content. Both Facebook Stories and Instagram Stories exist, and leadership asks: Which product should we invest in, a...
Implement list cloning and k-frequency finder
You are given two separate coding tasks. --- Problem 1: Deep copy a linked list with extra pointers You are given the head of a singly linked list. Ea...
Compute interval mode, BST range sum, exclusive time
You are given several independent coding tasks. A) Most frequent integer covered by intervals You are given an integer range [-M, M] and a list of inc...
Design tables for event-driven metrics
Design a Relational Schema for Consumer-App Event Analytics Context and Assumptions You are designing the event store for a high-volume consumer app. ...
Clone list with random pointers
Question You are given the head of a singly linked list where each node has two pointers: next and random. The random pointer may be null or point to ...
Reverse sublist between equal-value nodes
Given the head of a singly linked list and a target value v that appears at least twice, reverse the sublist starting at the first node with value v a...
Design a price tracking system
Question Design a price tracking system for e-commerce sites (similar to price-history tools such as CamelCamelCamel or Keepa). The system ingests pro...
Design a basic bank system API
In-Memory Bank System: API, Data Model, Invariants, Semantics, and Edge Cases Goal Design and implement an in-memory bank system that supports account...
Find connected region sizes in matrix
Given an m x n grid of characters grid and a target character ch, implement: ( 1) sizeOfRegion(grid, r0, c0, ch) -> int that returns the size of the 4...
Design an online auction platform
System Design: Real-Time English Auction Platform Goal Design an online auction platform that supports English-style auctions with: - Reserve price - ...
Compute Sliding Window Averages
Given a list of numbers nums and a positive integer window_size, compute the average of every contiguous subarray of length window_size. Return a list...
Design a newsfeed dislike model
Design a machine learning system for a social newsfeed that predicts the probability that a user will dislike a post. Assume there is already an exist...
Implement held transfers with accept/cancel
Question Design and implement a two-phase ("pull-style") money-transfer system in which funds are first held on the source account and then either cap...
How do you expand nested placeholders in strings?
You are given a dictionary of string templates. Keys are identifiers like X, Y, Z. A template may contain placeholders of the form %KEY%, which should...
Evaluating and launching Instagram Stories
Context You are evaluating the rollout and impact of Stories, an ephemeral sharing format similar to Snapchat, across two apps: Instagram and Facebook...
Design an online chess game with undo and leaderboard
Scenario Design a real-time online chess game service. Core requirements - Users can challenge friends and start a game session. - Two players take tu...
Visualize Netflix metric trends
Visualizing a Streaming Metric for Netflix Prompt Choose one streaming metric (for example, Daily Active Viewers or Average Watch Duration) and descri...
Solve grid shortest path and robot cleaning
Question LeetCode 1091. Shortest Path in Binary Matrix; LeetCode 489. Robot Room Cleaner https://leetcode.com/problems/shortest-path-in-binary-matrix/...