Moderate RAG Question 92 of 223

What is reranking after retrieval?

GenAI / LLM · Speak this in 60–90 seconds · Faridabad & Delhi NCR

Text inTokens

TransformerAttention

Text outNext token

A reranker scores the first-stage hits more carefully, often with a cross-encoder.

LLMs use tokens (not full words) because it helps them:

RAG questions separate people

who only read docs from people who shipped.

Keep it short, concrete,

and tied to GenAI / LLM work.

Stable token IDs

Each piece maps to a number the network can learn.

Fits the model

Fixed pieces are what transformers expect as input.

Before you speak the answer, walk the interviewer through these steps:

1
A reranker scores the
first-stage hits more carefully, often with a cross-encoder.
2
You keep the top
few for the prompt.
3
It cuts noise that
would otherwise distract the generator.
4
Give an example
One tiny concrete case you can say aloud.
5
Common mistake
What juniors usually get wrong.
6
Close
When you pick this over the alternative.

Here's a short line you can speak, broken into clear beats:

Say this line

“You keep the top few for the prompt.”

Break into beats

Youkeepthetopfewfor

Speaking order

2987408337471632900

Note: Adapt this scaffold to your own project — keep it under 60–90 seconds.

A reranker scores the first-stage hits more carefully, often with a cross-encoder. You keep the top few for the prompt.