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: Define quality and latency budgets; Measure cost by workload; Use routing or model selection; Reduce unnecessary context and calls; Validate changes with evaluation
Key reasoning:
- Define quality and latency budgets
- Measure cost by workload
- Use routing or model selection
- Reduce unnecessary context and calls
- Validate changes with evaluation
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
- Requirements and constraints
- Architecture and trade-offs
- Reliability, security, cost, and operations
What a Strong Answer Should Cover
- Define quality and latency budgets
- Measure cost by workload
- Use routing or model selection
- Reduce unnecessary context and calls
- Validate changes with evaluation
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
- What quality target must remain fixed?
- Where is the largest avoidable cost?
- How would you validate that cheaper is still good enough?
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.
