MSMohd Sameerinmohd-sameer.hashnode.dev·13h ago · 6 min readBeyond the Training Data: A Beginner's Guide to Retrieval-Augmented Generation (RAG)Imagine you are preparing for a massive, highly specific exam. You have two choices: Memorize thousands of textbooks, close them all, and rely strictly on your memory. Sit at a desk with an open int00
MSMohd Sameerinmohd-sameer.hashnode.dev·Jun 30 · 5 min readHow ChatGPT or any LLMs Understands Your Questions?If you’ve used ChatGPT, Gemini, or Claude, you’ve interacted with some of the most complex software ever built. But beneath the surface, these tools aren't "thinking" the way humans don they are perfo00
MSMohd Sameerinmohd-sameer.hashnode.dev·May 31 · 7 min readBehind the Feed: How Instagram Stores Reels, Photos, and DraftsImagine you are shooting a Reel. You record a 30-second clip, add music, overlay some text captions, and apply a filter. Just before hitting "Share," you hesitate—it needs a final polish tomorrow. You00
MSMohd Sameerinmohd-sameer.hashnode.dev·May 31 · 9 min readHow WhatsApp Works Without Internet: Offline Messaging and Sync ExplainedImagine you are boarding a flight. You switch your phone to Airplane Mode, cutting off all cellular and Wi-Fi networks. You open WhatsApp, type a quick message to a colleague—“Just boarding, will upda00
MSMohd Sameerinmohd-sameer.hashnode.dev·May 23 · 9 min readReact Navigation vs. Expo Router: The Ultimate Architectural GuideIf you have built cross-platform mobile apps for any length of time, you know that managing how users move between screens is one of the most deceptively complex parts of the job. In a web application00
