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When is RAG not helpful? What are the limitations of Retrieval-Augmented Generation?

Understanding RAG limitations and when to use alternatives

LLMProduction MLReal Interview
Updated Dec 23, 2025

Question

RAG Limitations

Difficulty: Medium
Estimated Time: 10-15 minutes
Tags: RAG, LLM, System Design
Type: Technical Concept


Question

Give a situation when RAG is not helpful. What are the limitations of Retrieval-Augmented Generation?


What They're Looking For

  • Deep understanding of RAG beyond just "how it works"
  • Critical thinking about tool selection
  • Knowledge of alternative approaches
  • Real-world experience with RAG failures

Your Solution

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