Meta Analytics & Experimentation Interview Questions
Practice 1,134 real interview questions from Meta. Covers Coding & Algorithms, Analytics & Experimentation, Data Manipulation (SQL/Python), Behavioral & Leadership. For roles including Data Scientist, Software Engineer, Machine Learning Engineer, Data Engineer.
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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...
How should you evaluate unconnected content?
A social media platform has launched a feed feature that increases the share of unconnected content, meaning posts from creators who do not have an ex...
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...
Solve Subarray Sum and Local Minimum
Two coding problems were reported in the same phone-screen round: 1. Count target-sum subarrays. Given an integer array nums and an integer k, return ...
Solve delimiter and CSV tasks
The interview included two coding tasks: 1. Validate bracket sequences. Given a string consisting only of the characters (, ), [, ], {, and }, determi...
How would you evaluate stolen-post detection?
You are interviewing for a Meta DSA (product analytics / data science) role. The product team is launching a new Stolen Post Detection algorithm that ...
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 ...
Implement a Streaming VMStat Alert
Write a command-line program that reads a continuous stream of vmstat-style output from standard input and raises an alert based on a sliding time win...
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...
Implement a Timestamped Banking System
Implement an in-memory banking system that processes API calls in nondecreasing timestamp order. Support the following operations: - create_account(ti...
Count heavy callers in 7 days
You are given two tables. users - user_id BIGINT PRIMARY KEY - country_code STRING calls - call_id BIGINT PRIMARY KEY - caller_id BIGINT - recipient_i...
Implement fast power and k-palindrome
The phone screen included two coding tasks: 1. Fast exponentiation Given a floating-point number x and a signed integer n, compute x raised to th...
Validate abbreviations and brackets
The coding round included two short implementation problems: 1. Abbreviation validation Given a lowercase word word and a string abbr, determine wheth...
Troubleshoot a Midnight Web Server Outage
You are on call for a Linux-based web application that lets customers submit orders and receive confirmations. In the middle of the night, you receive...
Should WhatsApp launch group calls?
WhatsApp currently supports only one-to-one calling and is considering launching group calling for personal users. The product goal is to increase eng...
Count Recent High-Volume Call Users
Given the following tables: users - user_id BIGINT - country STRING - is_active BOOLEAN calls - call_id BIGINT - initiated_at TIMESTAMP - caller_id BI...
Solve coding and AI-assisted tasks
This interview included several algorithm problems across a phone screen, onsite coding, and an AI-assisted coding round. Solve the following tasks: 1...
Infer an Unknown Alphabet Order
You are given a list of words that is already sorted according to an unknown alphabet. Derive one valid ordering of the characters in that alphabet. R...
How to test account ranking change
A product team is evaluating a change to the account switcher in a multi-account app. Current experience: - When a user opens the account switcher, ac...
Evaluate AI-assisted ad creation
Meta is considering launching an AI-assisted ad creation feature for advertisers. The feature helps advertisers generate ad copy and/or creatives insi...