Meta Data Manipulation (SQL/Python) 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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Analyze Change in App Metrics and Feature Impact
Scenario A consumer app has either launched a new feature or observed a sudden change in a key metric. You are asked to investigate and drive a decisi...
Analyze Key Metrics for Notification System Success
Scenario You are evaluating a new push-notification system for a social app. The goal is to determine whether the new system improves user value witho...
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...
Evaluate Marketing Campaign's Click-Through Rate Effectiveness
Scenario A campaign currently shows a click-through rate (CTR) of 4.2%. Leadership asks whether this is good or bad relative to expectations. Task Sta...
Define Product Metrics: Align Stakeholders, Measure Success, Improve Results
Behavioral Question: Defining New Product Metrics Without Clear Guidance Scenario You are interviewing for a Data Scientist role in a product organiza...
Promote Inclusion and Overcome Barriers in Social-Commerce Team
Behavioral Interview: Barriers, Feedback, and Inclusion (Data Scientist — Social Commerce) Context You are interviewing for a Data Scientist role on a...
Identify Features for Fake News Detection on Facebook
Design a Machine-Learning System to Flag Fake News on Facebook Scenario An increase in fake news has been detected on the platform. You are asked to d...
Determine Probability of Video Selection and Impact Evaluation
Video Recommendation Push: Selection Probabilities, Complements, and Design Choices Scenario You are designing a push-notification system that recomme...
Influence Stakeholders Without Authority: Strategies and Outcomes
Scenario Meta Data Scientist onsite behavioral & leadership loop. The interviewer probes how you drive impact and alignment on a cross-functional prod...
Determine Success Metrics for Circle Feature Optimization
Scenario Meta is evaluating a new social feature called Circle (similar to Facebook Groups), where members join a group and post and comment within it...
Calculate CTR and ad revenue
This interview included two SQL tasks. Task 1: Compare CTR during peak and non-peak hours You are given three tables: - ads(ad_id BIGINT, advertiser_i...
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...
How to evaluate emoji reactions?
A messaging app plans to launch an emoji reactions feature. Users can react to a message by long-pressing the message for 5 seconds and selecting an e...
Detect earliest collision among moving cars
You are given n vehicles with kinematics parameters. A “collision” means two vehicles occupy the same position at the same time. Assume continuous tim...
Describe learning from a post-interview bug
Behavioral Prompt: Bug Discovered After a Remote Technical Screen Context You are in a remote technical screen for a Machine Learning Engineer role. Y...
Handle feedback and priority conflicts
Behavioral & Leadership Interview (Software Engineer, Onsite) Context: You will be asked to demonstrate ownership, resilience, communication, and data...
Solve parsing, counting, ranges, and window problems
Solve the following four algorithm problems: 1) Expression evaluator with + and : Given a string s containing non-negative integers, '+' and '' operat...
Count subarrays summing to target
Given an integer array nums and an integer target T, return the number of contiguous subarrays whose sum equals T. Provide an algorithm that runs in l...
Find kth smallest pair sum with heaps
You are given two nondecreasing arrays A (length n) and B (length m) of non-negative integers and an integer k (1 <= k <= n*m). Return the k-th smalle...
Return k smallest elements using heap
Given an unsorted array nums of up to 1,000,000 integers and an integer k (1 <= k <= nums.length), return the k smallest elements in ascending order. ...