xAI Interview Question Bank
xAI's loop is built around speed and founder-style intensity: a single 15-minute video screen often gates the entire pipeline, the take-home assumes you will use Cursor / Claude Code, and onsite rounds run in person in Palo Alto with offers decided minutes after the final round. Bars are calibrated less for algorithmic novelty than for raw shipping velocity, low-level systems instincts (concurrency, GPU/inference, distributed numerics), and willingness to work 60–100 hour weeks RTO5.
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Dynamic Batching for Autoregressive DecodingFixed-Window Token LimiterThread-Safe BankAccount WrapperCode Review: Find Issues in an Input Field ImplementationDistributed Matrix Multiplication with Data Parallel and FSDP SimulationDesign a Restorable (Checkpointable) IteratorToken LimiterMinimum Time to Produce a Goal Dataset in a Data Pipeline (Parallel Tasks)Unflatten: Refill a Nested Template Structure with Values from a Flat ListFlatten a Nested Python Structure (lists/dicts/tuples) into a List of IntegersCalculate Active Hours for Twitter SpacesResearch and Machine Learning Coding4-hour Take Home Project Taskkth elementHandwrite parallelized sortRate Limiter DesignKV Store DesignMultithread SortingIn-Memory Database ImplementationDetermine large rice bagsTwitter Insight Platform with Rate Limiting and DockerizationFind the Most Common N-grams