---
title: "Discussion on \"The Data Quality Handbook: Data Errors, the Developer's Role, and Validation Layers Explained.\" | Hashnode"
description: "Discussion on \"The Data Quality Handbook: Data Errors, the Developer's Role, and Validation Layers Explained.\". In August 2012, Knight Capital, a major trading firm in the United States, deployed faulty trading software to its production system. The system used this incorrect configuration data and it triggered"
url: "https://hashnode.com/posts/data-quality-handbook-data-errors-the-developer-s-role-validation-layers/69dea3b491716f3cfb75fd9d"
---

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Discussion

# [The Data Quality Handbook: Data Errors, the Developer's Role, and Validation Layers Explained.](https://freecodecamp.org/news/data-quality-handbook-data-errors-the-developer-s-role-validation-layers?utm_source=hashnode&utm_medium=feed)

In August 2012, Knight Capital, a major trading firm in the United States, deployed faulty trading software to its production system. The system used this incorrect configuration data and it triggered

Apr 14 · 38 min read · freecodecamp.org  
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-   [#data](https://hashnode.com/tag/data)
-   [#data-science](https://hashnode.com/tag/data-science)
-   [#validation](https://hashnode.com/tag/validation)
-   [#testing](https://hashnode.com/tag/testing)
-   [#handbook](https://hashnode.com/tag/handbook)

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