1Z0-1127-25 Fundamentals of Large Language Models Practice Question
A developer uses OCI Generative AI's chat endpoint with a system message placed after user messages. The model ignores the system message. What is the most likely reason?
⚠ Common exam trap
Oracle often tests the specific API message ordering requirement, where candidates mistakenly attribute the failure to model limitations or hyperparameters rather than the structural placement of the system message.
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 message is placed after user messages
In OCI Generative AI's chat endpoint, the system message must be placed before user messages to establish the model's behavior and context. When placed after user messages, the model treats it as part of the conversation history rather than a directive, causing it to be ignored. This ordering is a fundamental requirement for the chat API's message structure.
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 system message is too long
Why it's wrong here
Length may cause truncation but not complete ignoring.
- ✗
Temperature is set too high
Why it's wrong here
Temperature affects creativity, not adherence to system message.
- ✗
The model has not been fine-tuned for instruction following
Why it's wrong here
Even base models often respect system messages if placed correctly.
- ✓
The system message is placed after user messages
Why this is correct
The standard order is system first, then user; otherwise the model may misinterpret.
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