{"blocks": [{"key": "683a6f31", "text": "Scenario", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "25072ff9", "text": "Hiring-manager technical discussion – building new product features", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "be909d26", "text": "Question", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "3fa283dc", "text": "Design an end-to-end recommendation system for Spokeo: outline data collection, feature engineering, model selection, evaluation metrics, real-time serving, and A/B testing plan.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "e7c6a0ab", "text": "Hints", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "046bcfae", "text": "Cover data pipeline, cold-start issues and offline/online metrics.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}], "entityMap": {}}