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Metadata Filtering and ACL-Aware Retrieval (EXPLAINED)

Scenario BasedRAGHard25 min read

Hard RAG interview question on metadata filtering and acl-aware retrieval — architecture, trade-offs, eval, and production patterns.

TL;DR — Quick Answer

Store tenant_id, ACL groups, classification, and doc version as indexed metadata. Apply mandatory filters at retrieval time — never rely on post-generation redaction alone. Audit every query-to-chunk access and test filter bypass attempts in security reviews.

The Interview Question

Design metadata filtering and ACL-aware retrieval so users never receive unauthorized chunks in enterprise RAG.

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RAGACLMetadataMicrosoftSalesforce

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