1Z0-1127-25 LangChain and AI Application Development Practice Question
A developer is building a LangChain application that uses OCI Generative AI service. They want to implement streaming responses from the LLM to improve user experience. Which TWO actions are necessary to enable streaming?
⚠ Common exam trap
Test-takers frequently confuse the `streaming` parameter (which tells the model to use the streaming API) with the callback handler (which actually processes the stream), assuming one alone is sufficient, but both are required for a complete streaming implementation.
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
✓
Use a StreamingStdOutCallbackHandler or custom callback to handle stream events
LangChain's streaming architecture requires a callback handler (like `StreamingStdOutCallbackHandler` or a custom one) to process tokens as they are emitted from the LLM. Without a callback, the stream events are generated but not consumed, so the application cannot output partial results in real time.
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