1Z0-1127-25 Prompt Engineering Practice Question
A prompt engineer is tasked with reducing hallucinations in a document-grounded generation task using Cohere Command R. Which system prompt component is MOST effective for enforcing that the model only uses provided 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
✓
"Answer the question based solely on the provided document. If the document does not contain the answer, say 'I don't know'."
Explicit instruction to base answers solely on provided context, with a constraint to say if information is missing, directly reduces hallucinations.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
"You are an expert in the field. Use your extensive knowledge to answer."
Why it's wrong here
Encourages reliance on internal knowledge, increasing hallucination risk.
- ✗
"Provide a detailed answer with references."
Why it's wrong here
Vague; may cause the model to generate plausible but unsupported references.
- ✗
"Use a temperature of 0.0 for factual answers."
Why it's wrong here
Reduces randomness but does not prevent hallucination from internal knowledge.
- ✓
"Answer the question based solely on the provided document. If the document does not contain the answer, say 'I don't know'."
Why this is correct
Clearly constrains the model to the document and provides a fallback response, reducing hallucinations.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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