1Z0-1127-25 Self-consistency Practice Question
A prompt engineer is using the self-consistency technique to improve answer reliability. Which TWO steps are essential when implementing self-consistency?
⚠ Common exam trap
Candidates often think temperature must be zero for reproducibility, but self-consistency requires non-zero temperature to generate diverse reasoning paths.
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
✓
Aggregate the outputs (e.g., by majority voting or marginalizing over reasoning steps) to select the most consistent answer
Self-consistency involves two essential steps. First, generate multiple independent reasoning paths by running the prompt several times with a non-zero temperature to ensure diversity (option E). Second, aggregate the outputs (e.g., by majority voting or marginalizing over reasoning steps) to select the most consistent answer (option D). Options D and E are correct. Option B is not essential because chain-of-thought prompting is a separate technique that can be used with self-consistency but is not required for the method.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use tree-of-thought to explore all possible reasoning branches
Why it's wrong here
Tree-of-thought is not essential for self-consistency; it is a separate technique for exploring reasoning branches.
- ✗
Use a chain-of-thought prompt to guide the generation of reasoning paths.
Why it's wrong here
This is correct because self-consistency uses chain-of-thought prompts to structure the reasoning steps, enabling diverse yet coherent reasoning paths.
- ✗
Set temperature to 0 for reproducible outputs
Why it's wrong here
Temperature 0 yields deterministic, identical outputs, preventing the diversity required for self-consistency.
- ✓
Aggregate the outputs (e.g., by majority voting or marginalizing over reasoning steps) to select the most consistent answer
Why this is correct
Correct. Aggregating outputs (e.g., majority voting) is the final step in self-consistency.
- ✓
Generate multiple independent reasoning paths by running the prompt several times with a non-zero temperature
Why this is correct
Correct. Generating multiple independent reasoning paths with non-zero temperature is the first essential step.
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