Question 4: CCAR-P: Claude Certified Architect - Professional

You are operating an interactive assistant whose dominant performance constraint is per-turn latency. Quality on routine turns is already acceptable. Which configuration adjustment most directly improves latency without disproportionately damaging quality?

1. A. Reduce retrieval depth to the top-k passages that historically cover the answer, and cache stable system-prompt content. — đáp án hiện tại
2. B. Increase retrieval depth to the corpus maximum to improve recall regardless of latency.
3. C. Disable prompt caching entirely to ensure fresh context processing on every request, preventing stale prefix content from affecting latency-sensitive interactions.
4. D. Switch every turn to the heaviest available model to maximize output quality, accepting that the increased model latency will worsen the per-turn SLO rather than improve it.