{"blocks": [{"key": "3861a761", "text": "Scenario", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "0935935f", "text": "Phone interview focusing on breadth and depth of machine-learning knowledge.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "c6359d65", "text": "Question", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "88d1c2ba", "text": "Explain the k-fold cross-validation procedure. What are the trade-offs in choosing the number of folds, and when might cross-validation give misleading performance estimates?", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "21c925a0", "text": "Hints", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "e19a93ca", "text": "Address bias-variance, data leakage, temporal data, and class imbalance effects.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}], "entityMap": {}}