How would you design a cache that returns a result even if the user's question isn't a 100% string match to a previous query?

How do you handle a "Delete" request in your vector database if a user wants their data removed (Right to be Forgotten)?

If a company has a 1,000-page internal wiki that updates daily, would you recommend RAG or fine-tuning? Why?

Why is "fixed-length" chunking often insufficient? How would you handle a document where a single sentence contains a critical fact but spans a chunk boundary?