1Z0-1127-25 OCI Generative AI Service Practice Question
A developer is using the OCI Generative AI Chat API with a system prompt to guide the assistant's behavior. They notice that after a few turns, the assistant starts ignoring the system instructions. What is the MOST likely cause?
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
✓
The system prompt (preamble) is only sent once and may be truncated as the conversation grows
The preamble is sent only on the first turn; it may be truncated or lost as conversation history grows. The developer should inject the preamble in each request or manage history carefully.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The temperature is set too high, causing the model to ignore instructions
Why it's wrong here
Temperature affects randomness, not adherence to system instructions per se.
- ✓
The system prompt (preamble) is only sent once and may be truncated as the conversation grows
Why this is correct
In the Chat API, the preamble is sent only at the start; if the conversation history exceeds the context window, the preamble may be dropped, causing the model to lose instructions.
- ✗
The model is not fine-tuned to follow system prompts
Why it's wrong here
Foundation models are trained to follow system prompts; the issue is about message management.
- ✗
The conversation history is not being sent with subsequent requests, so the model loses context
Why it's wrong here
History is typically sent; the issue is with the preamble.
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