You know what RAG is. The interviewer wants to know what breaks at 2 a.m. and what you do about it.

Five self-contained interactive pages. Every concept is drawn, the key drawings are interactive (steppers, reveal cards), and every interviewer question has a full model answer plus a troubleshooting card in symptom, detect, cause, fix, prevent order.

What is inside

• 01 GenAI, explained simply: transformers, RAG (chunking, embeddings, top-k and the similarity threshold with the recipe for picking it, temperature with real softmax numbers), agents and orchestration (LangGraph, Microsoft Agent Framework, Bedrock Agents), LLMOps, tuning. 46 questions with full answers, 45 troubleshooting cards.
• 02 GenAI with the code: a full RAG program in LangChain line by line, agents with tools and memory, an LLMOps program that runs for real (tokens, 429 backoff, caching, tracing, a deploy gate), a LoRA program. 42 code blocks, 32 TL;DR Q&As, 32 fix cards.
• 03 Two hello worlds walked through: a RAG program and an agent program, every line beside a drawing of what it does to the data. 30 frames.
• 04 The refresher.
• 05 Visual answers: swimlanes, pipeline diagrams, troubleshooting flows. Free sample at niktechai.com/kits.

Who it is for: engineers interviewing for AIengineer, ML engineer, GenAI lead, AI platform or AI architect roles.

How it works: download the zip, open index.html in any browser. No login, no install, no internet. Mac, Windows, Linux, iPad. No narration in this edition.