Azure AI Language feature that builds a question-and-answer knowledge base from documents, FAQs, or text, letting you create a bot that answers accurately from curated content instead of generating answers freely.
In AI-901 it's distinguished from a generative LLM: Custom Question Answering only answers within the explicitly loaded knowledge, giving more control and lower risk of hallucination, ideal for corporate FAQs.
Custom Question Answering is a concept that can show up on the exam. Check the full guide to see it in context.