1Z0-1127-25 LangChain and AI Application Development Practice Question
In LangChain, which component is responsible for connecting a language model to a retriever and a prompt template to answer questions based on retrieved documents?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
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RetrievalQA chain
RetrievalQA chain is designed to combine a retriever and an LLM to answer questions based on retrieved documents.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
RetrievalQA chain
Why this is correct
RetrievalQA chain integrates a retriever and an LLM to generate answers from retrieved context.
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LLMChain
Why it's wrong here
LLMChain combines a prompt template and an LLM, but does not include a retriever.
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SequentialChain
Why it's wrong here
SequentialChain runs multiple chains in sequence, not specifically for retrieval.
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AgentExecutor
Why it's wrong here
AgentExecutor runs an agent with tools, not specifically a retrieval chain.
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