{"blocks": [{"key": "56aa8cb3", "text": "Scenario", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "e352e2aa", "text": "Facebook Groups team wants to understand current product health and evaluate a proposed 'comment collapsing' feature.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "ce8ff354", "text": "Question", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "e1358bb7", "text": "What metrics would you track to judge the performance of Facebook Groups today? How would you design an experiment to decide whether the new comment-collapsing feature should be launched?", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "052a5515", "text": "Hints", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "1a5b6d4c", "text": "Define north-star and guardrail metrics, outline experiment design, success criteria, and potential trade-offs.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}], "entityMap": {}}