What is hybrid search?
PICTURE THIS: AN LLM TURN
Simple meaning
Hybrid search combines lexical matching such as BM25 with dense vector search.
WHY — Tokens instead of words?
LLMs use tokens (not full words) because it helps them:
people who only read docs from people who shipped.
and tied to GenAI / LLM work.
Each piece maps to a number the network can learn.
Fixed pieces are what transformers expect as input.
STEPS — What happens step by step?
Before you speak the answer, walk the interviewer through these steps:
- 1Hybrid search combines lexical
matching such as BM25 with dense vector search.
- 2Keywords catch exact IDs
and rare terms
- 3How it works
vectors catch paraphrases.
- 4Fusing both lists usually
beats either method alone.
- 5Common mistake
What juniors usually get wrong.
- 6Close
When you pick this over the alternative.
EXAMPLE — See it in action
Here's a short line you can speak, broken into clear beats:
Note: Adapt this scaffold to your own project — keep it under 60–90 seconds.
Key takeaway
Hybrid search combines lexical matching such as BM25 with dense vector search. Keywords catch exact IDs and rare terms