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hybrid retrieval

Applied AI interview questions tagged hybrid retrieval, across every topic.

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Concepts behind "hybrid retrieval"

The curriculum that explains the ideas these questions test.

Core
🤖 Retrieval & AgentsSign in
Hybrid Search and Reciprocal Rank FusionPure vector search captures meaning but misses exact terms (codes, names, SKUs); pure keyword search (BM25) nails exact terms but misses synonyms and intent. Hybrid search runs both and fuses the results, and Reciprocal Rank Fusion is the simple way to merge their rankings without calibrating incomparable scores. Applied-AI interviews probe it because production retrieval is almost always hybrid, and knowing why (and how to fuse) signals real RAG experience.
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