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Library Demo System Design

HardSystem Design00:00
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Your question is Library Demo System Design. Take a moment with it on the right.

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Problem

Craft Demo: build (1) a Library that should contain & render the Sample UI (credit score view) based on JSON data provided to it, and (2) a Demo App that supplies the data/JSON to the library to render the UI; the data must be in a JSON file or a custom API, and the UI data should refresh on updating JSON.

Asked in the Intuit Mint iOS craft demo stage. The sample UI is a credit score gauge plus a "Where You Stand" score distribution. Focus on how the library parses, validates, and renders changing JSON cleanly on mobile.