Scenario-Based Questions

Definition

Complex system-design questions where you must architect an AI pipeline to solve a specific, high-scale business problem.

Explain Like I'm New

There is no 'right' answer. The interviewer wants to hear you debate the trade-offs between Cost, Latency, Accuracy, and Security.

Real World Example

Scenario: 'We want to build a customer support bot for a massive bank. It must be highly accurate, NEVER hallucinate financial advice, and cost less than $0.01 per query. Design the architecture.'

Common Use Cases

•System Design interviews
•Principal Engineering

Interview Questions

basic

Scenario: Your RAG system is accurately retrieving the right documents, but the LLM is taking 10 seconds to generate the answer. How do you fix this?

intermediate

Scenario: Users are tricking your company's AI into swearing at them. How do you architect a solution?

Flash Cards

Question

Fix 10-second latency?

Click to reveal answer

Answer

Implement Semantic Caching so repeat questions return instantly. Use a smaller, faster model (like LLaMA-3-8B instead of GPT-4) for summarization. Ensure the UI uses 'Streaming' so the user sees words appearing immediately rather than waiting for the whole paragraph.

Question

Prevent swearing?

Click to reveal answer

Answer

Implement an external 'Guardrail' architecture. Before the AI's response is sent to the user, pass it through a secondary, lightweight classification model. If the classifier detects toxicity or prompt injection success, intercept the message and return a canned error response.