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Why is it important to provide the same embedding function when loading a persisted Chroma vector store?

hard📝 Conceptual Q10 of 15
LangChain - Embeddings and Vector Stores
Why is it important to provide the same embedding function when loading a persisted Chroma vector store?
ABecause Chroma requires embedding function to rebuild the database
BBecause embeddings must match for similarity search to work correctly
CBecause embedding function encrypts the stored vectors
DBecause embedding function controls the UI rendering
Step-by-Step Solution
Solution:

  1. Step 1: Understand embedding function role in similarity

    Embedding function creates vectors; same function ensures vectors match queries.

  2. Step 2: Reason about loading persisted store

    Using a different embedding function breaks similarity search accuracy.

  3. Final Answer:

    Because embeddings must match for similarity search to work correctly -> Option B

  4. Quick Check:

    Same embedding function ensures correct similarity [OK]
Quick Trick: Use same embedding function to keep vector consistency [OK]
Common Mistakes:
  • Thinking embedding function rebuilds database
  • Assuming it encrypts vectors
  • Confusing embedding function with UI logic

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