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Question 22 of 44
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Hotspot Solution:
| Retrieval-Strategy Claim | Accurate? |
|---|---|
| Dense vector retrieval matches paraphrases and conceptually related language | Yes |
| Sparse lexical retrieval (BM25) retains strong sensitivity to exact tokens, IDs, and product codes | Yes |
| Structured query retrieval is appropriate for explicit predicates, joins, and aggregations | Yes |
| Hybrid retrieval is identical to dense retrieval alone | No |
| Random sampling is an effective relevance strategy for production Q&A | No |
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Dense embeddings capture semantic similarity, sparse BM25 captures exact lexical tokens, and structured queries handle relational aggregations. Hybrid search combines dense and lexical retrieval with rank fusion/reranking, whereas random sampling provides no relevance guarantees.