{"blocks": [{"key": "8cc1437b", "text": "Question", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "380989d3", "text": "Design an internal tool that returns historical currency-exchange rates and supports 10 k QPS. Describe the APIs, data model, storage layer, caching strategy, consistency requirements, scalability plan, and monitoring approach.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}], "entityMap": {}}