https://dataandaischool.io/tags/beginners/Recent content in Beginners on Data & AI SchoolHugoen-usWed, 19 Aug 2026 00:00:00 +0000https://dataandaischool.io/ai-engineering/posts/evaluating-genai-systems/Wed, 19 Aug 2026 00:00:00 +0000https://dataandaischool.io/ai-engineering/posts/evaluating-genai-systems/GenAI systems need real evaluation — accuracy, relevance, safety — just like any other engineering system, not vibes-based judgment.https://dataandaischool.io/ai-engineering/posts/ai-agents-101/Tue, 18 Aug 2026 00:00:00 +0000https://dataandaischool.io/ai-engineering/posts/ai-agents-101/The shift from a model that answers questions to one that takes real actions using tools — the plan, act, observe, repeat loop.https://dataandaischool.io/ai-engineering/posts/hallucinations-why-and-how-to-reduce/Mon, 17 Aug 2026 00:00:00 +0000https://dataandaischool.io/ai-engineering/posts/hallucinations-why-and-how-to-reduce/The honest explanation for why LLMs make things up, and practical ways to reduce it — grounding, citations, and a few other levers.https://dataandaischool.io/ai-engineering/posts/embeddings-and-vector-similarity/Wed, 05 Aug 2026 00:00:00 +0000https://dataandaischool.io/ai-engineering/posts/embeddings-and-vector-similarity/How text gets turned into numbers that capture meaning, and why ‘similar meaning = nearby numbers’ is the foundation of search, recommendations, and RAG.https://dataandaischool.io/ai-engineering/posts/prompting-fundamentals/Tue, 04 Aug 2026 00:00:00 +0000https://dataandaischool.io/ai-engineering/posts/prompting-fundamentals/Why specificity beats cleverness, and how to talk to a model that takes everything you say literally.https://dataandaischool.io/ai-engineering/posts/tokens-and-context-windows/Mon, 03 Aug 2026 00:00:00 +0000https://dataandaischool.io/ai-engineering/posts/tokens-and-context-windows/What a token actually is, why every model has a memory limit, and why this quietly affects cost, speed, and what you can even ask a model to do.https://dataandaischool.io/ai-engineering/posts/how-llms-actually-work/Sun, 02 Aug 2026 00:00:00 +0000https://dataandaischool.io/ai-engineering/posts/how-llms-actually-work/No math-heavy transformer internals, just the core idea: an LLM is a very sophisticated autocomplete engine trained on huge amounts of text.https://dataandaischool.io/ai-engineering/posts/what-is-generative-ai/Sat, 01 Aug 2026 00:00:00 +0000https://dataandaischool.io/ai-engineering/posts/what-is-generative-ai/The simple difference between predictive AI and generative AI, explained without the jargon.