{"blocks": [{"key": "b167525f", "text": "Question", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "125b2fc6", "text": "Design an in-memory database that supports CRUD operations, efficient querying, transaction isolation, persistence/backup strategy, and horizontal scalability within a single-node memory-resident architecture.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}], "entityMap": {}}