AI Engineer interview questions (2026)

AI engineer interviews test ML & LLM fundamentals, building & deployment, a practical case, and judgement. Then practice them in a free AI mock interview tailored to your exact role.

ML & LLM fundamentals

• Explain at a high level how a large language model generates text.
• What is retrieval-augmented generation (RAG), and when would you use it?
• How do you evaluate whether an AI feature is actually good?

Building & deployment

• How would you build and ship an AI feature into a product?
• How do you control cost and latency when calling a model?
• How do you handle hallucinations and unreliable outputs?

Case & judgement

• Walk me through designing an AI assistant for a specific task.
• When would you fine-tune versus prompt versus use RAG?
• How do you think about safety and misuse of an AI feature?