Practice — LLM Application System Design (6 questions)

A B2B SaaS company wants an assistant that answers questions about its product. Three complaints have come in from a prototype built with a plain system prompt:

• (a) It confidently describes settings that no longer exist since last quarter's release.
• (b) Answers are in the wrong tone and ignore the required "Summary / Steps / Related links" layout about 30% of the time even with examples in the prompt.
• (c) It gives generic advice about "your admin panel" instead of the customer's actual configuration.

1. For each complaint, decide whether prompt engineering, RAG, or fine-tuning is the right lever, and justify it.
2. Explain why fine-tuning is the wrong fix for complaint (a).
3. Sketch the order in which you would apply the fixes and how you would know each one worked.