問題文
An analyst wants every answer from a chat model to keep a consistent role, tone, and set of ground rules across all requests in a support workflow. What is the role of the preamble in this setup?
選択肢
- It sets a hard limit on the randomness of the output, so a request that includes a preamble ignores the temperature and the sampling parameters for that call.
- It stores the conversation history, and each new request replays the earlier turns from that stored copy before the current message.
- It is a required field, and a request that omits it is rejected before the model runs so that the workflow cannot start without explicit ground rules.
- It supplies initial context and guiding instructions for the chat model, and when it is omitted the model uses its own default preamble instead.