Build a One-Pass Data Cleaning Pipeline
Company: xAI
Role: Data Engineer
Category: System Design
Difficulty: medium
Interview Round: Technical Screen
Overview: This question evaluates a candidate's competence in large-scale data engineering and system design, covering memory-bounded streaming IO, explainable per-document filtering, deduplication strategies, language detection, and metrics-driven data quality for language-model pretraining, and falls under the System Design / Data Engineering domain.