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Haystack

5 roadmaps31 questions

You will learn deepset's pipeline framework for production RAG and search: explicitly wired components, generators, document stores, retrievers and rankers, and agents with tools. Interviewers ask because Haystack's explicit component graph makes a pipeline inspectable and testable, which is the property production teams value over convenience.

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What does Haystack's LostInTheMiddleRanker do to an already-ranked document list?

level: seniorimportance: nice to knowfreq 28%

basics

~20 s

It reorders documents so the most relevant ones sit at the start and end of the list and the least relevant in the middle. It loads no model and computes no scores, trusting the incoming order to already be relevance-sorted, and word_count_threshold can cap how much text it passes on.

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