> For the complete documentation index, see [llms.txt](https://inquiry.sunbird.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://inquiry.sunbird.org/learn/product-and-developer-guide/question-and-question-set-service/architecture.md).

# Architecture

Below diagram represents the components involved and their arrangement in Question and Question set service.

1. The service module has play application and its internal actor module. 
2. Graph-engine acts as an interface between databases and service module

![inQuiry Backend Architecture and Tech Stack](/files/dkSObLm7CTVz1Hn9jH8P)


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