What is supervised vs unsupervised learning? Explain Linear Regression. What are the stopping criteria, Explain Logistic Regression. What are activation functions and which will you use when? What is LSTM? Difference between BERT, T5, and Open AI GPT models. Has RLHF been replaced by PPO or DPO? What is LangChain, RAG framework? What are the best chunking and retrieving techniques? How will you rank the chunks? How will you deploy a LLM? Preferred coding language, how do you test your code before deployment?