Meta Behavioral & Leadership Interview Questions
Practice 1,166 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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How would you evaluate pixel-issue notifications?
This question evaluates a data scientist's skills in experimentation design, metric framework development, causal inference, and measurement-aware ana...
Convert multi-currency revenue to USD totals
This question evaluates a candidate's competency in converting multi-currency revenue into USD totals by aligning event dates with FX rates, handling ...
Compute daily active ads
This question evaluates proficiency in data manipulation and analytics engineering, focusing on time-based event aggregation, status-based filtering, ...
Evaluate a new-listing notification feature
This question evaluates product analytics, causal inference, experimentation design, metric definition, and business-impact estimation competencies fo...
Determine feasibility and clean parentheses string
This pair of problems evaluates proficiency with graph algorithms (dependency modeling and cycle detection/topological ordering) and string processing...
Maximize unique characters from a word list
This question evaluates algorithmic problem-solving skills focused on combinatorial subset selection and character-uniqueness constraints in strings, ...
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...
Extend cloud file system with copy and compression
In-Memory Cloud File System V2: Copy, Capacity Updates, Compress/Decompress Design an in-memory file system with per-user quotas and additional operat...
Design a bank system with scheduled transfers
Bank System (OOD): Accounts, Transfers, Scheduling, Top Spending, Merge Design an in-memory banking system that supports: - account creation - deposit...
Design an in-memory cloud file system
In-Memory Cloud File System (OOD) Design an in-memory cloud file system that supports files owned by users with storage quotas. Data model / rules - E...
Solve three array/string/graph coding tasks
This set of three coding tasks evaluates proficiency in fundamental data structures and algorithms, covering multi-way array merging, custom character...
Evaluate Notification-Based Account Ranking
This question evaluates a data scientist's competency in causal inference, A/B test and experiment design, metric definition and selection, statistica...
Compute multi-account user distribution and unread pct
You are working on a product where a user can have multiple accounts, and each account can receive notifications. Tables Assume the following schemas:...
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...
Solve Three Algorithmic Problems
Three coding questions were mentioned: 1. Second-largest distinct permutation Given an array of integers that may contain duplicates, consider all ...
Compute Sliding Window Averages
This question evaluates proficiency in array manipulation, sliding-window techniques, and algorithmic efficiency including time and space complexity. ...
Solve four OA coding problems
This set of four problems evaluates core algorithmic competencies including array manipulation and counting in sorted arrays, resource-constrained opt...
Find two numbers summing to target without hashmap
This question evaluates array manipulation, index-tracking, and algorithmic problem-solving skills, with emphasis on time and space complexity trade-o...
Solve string transform and min-move sorting
This two-part problem evaluates string manipulation and algorithmic problem-solving competencies, specifically rule-based text transformation and comp...
Assess ranking change and design experiment
A multi-account product currently orders a user's accounts by most recent visit. The product team wants to change the ranking so that accounts with th...