Explanation
Hint: Identify the requirement first, then choose the approach that addresses the main constraints, trade-offs, failure modes, security, cost, and verification.
Correct answer: Measure retrieval separately; Inspect chunking and metadata; Evaluate ranking and context construction; Test model behavior independently; Use a representative evaluation set
Key reasoning:
- Measure retrieval separately
- Inspect chunking and metadata
- Evaluate ranking and context construction
- Test model behavior independently
- Use a representative evaluation set
Why the alternatives are weaker:
- Jumping to a technology before clarifying the problem
- Explaining the solution without the reasoning or trade-offs
- Omitting verification, failure handling, or prevention
What the interviewer is testing
- Problem isolation and evidence-based reasoning
- Safe mitigation and verification
- Prevention and operational learning
What a Strong Answer Should Cover
- Measure retrieval separately
- Inspect chunking and metadata
- Evaluate ranking and context construction
- Test model behavior independently
- Use a representative evaluation set
Common Mistakes
- Jumping to a technology before clarifying the problem
- Explaining the solution without the reasoning or trade-offs
- Omitting verification, failure handling, or prevention
Interviewer Follow-ups
- How would you prove retrieval is the problem?
- Which evaluation set would you use?
- What change would you test first?
Real-World Sample Answer
A strong real-world response should connect requirements to engineering decisions, explain why the chosen approach fits the constraints, and make failure, security, cost, observability, and verification explicit.
