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LangChain / RAG / Vector DBs · Lesson

Querying and Generating Answers

Develop the logic for processing user queries, retrieving relevant context, and synthesizing answers using the LLM.

Querying RAG: The Answer Flow

After integrating RAG components, the next step is to use them to answer user questions. This lesson covers the full process from a user's query to a generated answer.

We'll focus on the 'query-time' logic: how your system takes a question, finds relevant context, and synthesizes a coherent response using an LLM.

Understanding the User Query

A RAG system starts with a user's question, just like a search engine. This raw input is the trigger for the entire process.

  • It defines what information needs to be retrieved.
  • It guides the LLM on what kind of answer to generate.

No special formatting is typically needed at this initial stage; it's just plain text.

All lessons in this course

  1. Integrating All RAG Components
  2. Querying and Generating Answers
  3. Evaluating RAG System Performance
  4. Building a Golden Test Set for RAG
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