Course module
Interview Prep and Answer Frameworks
A practical way to answer AI system design questions without jumping straight into architecture. The source guide uses structured frameworks such as SPIDER for system design answers. This note turns that into a simple interview routine you can rehearse.
How this module was made: I study public references, then rewrite the concept in my own words with a scenario, mental model, checklist, diagram, and practice prompts. The goal is to make the idea easier to understand here, not send you away to read raw markdown.
Why this matters
Most candidates fail AI system design rounds because they start drawing components before clarifying the problem, users, constraints, and evaluation bar. A repeatable frame helps you sound senior and reduces rambling.
Visual mental model
Use this diagram as the quick recall map before reading the detailed points.
Rendering diagram...
Key ideas
- Start by scoping the problem and clarifying scale, latency, quality, compliance, and infrastructure.
- Prioritize requirements before choosing models, retrieval, or orchestration patterns.
- Draw the first architecture only after the success criteria are clear.
- Deep-dive the risky path: retrieval quality, model behavior, workflow handoff, eval, reliability, and cost.
- End with evaluation, observability, reliability, and trade-offs.
Design checklist
- Clarify user type, business goal, input/output, and scale.
- State quality bar and failure tolerance before proposing architecture.
- Choose whether the problem needs search, RAG, fine-tuning, workflow orchestration, or simple rules.
- Add evals, traces, fallback behavior, and owner review to the design.
- Close with latency, cost, security, and rollout trade-offs.
Interview prompts to practice
Design a customer support AI assistant for a SaaS product.
Design an internal data assistant for business analysts.
Design a document review system for legal contracts.
How would you debug poor answer quality in a RAG system?
How to study this module
- Read the scenario first and explain why the design is hard.
- Use the diagram to explain the flow out loud in two minutes.
- Compare bad v1 and better v1 before jumping to tools.
- Practice the interview prompts using the checklist.
- Apply the idea to one project, diagram, or architecture review.