{"blocks": [{"key": "d8dbae47", "text": "Scenario", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "de734909", "text": "Designing, deploying and evaluating ranking models and marketing emails for Prime Video", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "907681d9", "text": "Question", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "b42d603b", "text": "How would you approach sending marketing emails to customers to introduce a new Prime Video series? Outline your first steps, data requirements, and modeling approach. If the ranking function changes, how would you test whether the new function performs better? When you have several ranking functions, how would you determine which one is best?", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "34ccd778", "text": "Hints", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "6aa3e6e4", "text": "Discuss experiment design, offline evaluation metrics (e.g., NDCG, MAP), online A/B testing, statistical significance, and user engagement KPIs.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}], "entityMap": {}}