Data Scientist ML System Design Interview Questions
Practice the exact questions companies are asking right now.
Stabilize LLM inference and estimate needed repeats
You run an LLM-based sentiment model to score a fixed dataset of texts. Because the inference API doesn’t let you set temperature (and outputs are sto...
Design a time-series home-buy decision classifier
Take‑Home: Classifying Buy‑Now vs Wait Decisions in Housing Time Series Context You are given a monthly panel of regional housing and macro time serie...
Build a regression model for wind power output
Task: Snapshot Regression for Turbine-Level Power Prediction (Non–Time-Series) You are given turbine-level SCADA snapshots and concurrent weather data...
Detect credit-card transaction fraud
Credit-Card Fraud Detection: Decisions and System Design Context You are designing a real-time decisioning system for card transactions with strict la...
Design fraud detection from raw transactions
System Design: End-to-End Transaction Fraud Detection Context You are given a large, multi-table dataset of transactions and customer/merchant metadat...