PKPRINCE KUMARinprincekumar-engineer.hashnode.dev·Jul 14 · 8 min readWhere RAG Fails: Understanding the LimitationsINTRODUCTION Imagine you are taking an open book exam. You have access to a huge library, but someone else chooses only a few pages for you before you answer the question. If they bring the right page01M
PKPRINCE KUMARinprincekumar-engineer.hashnode.dev·Jun 30 · 6 min readHow ChatGPT Understands Your QuestionsINTRODUCTION: Every day, millions of people use ChatGPT to write, learn, solve problems, and explore ideas. But have you ever wondered what happens behind the scenes? How does ChatGPT understand your00
PKPRINCE KUMARinprincekumar-engineer.hashnode.dev·Jun 17 · 6 min readLinux File System HuntingUnderstanding Linux Like a Backend Engineer: Imagine building the world’s fastest Formula 1 car, your web app, but having no idea how the engine, fuel lines, or electrical systems work. That’s what ba00
PKPRINCE KUMARinmobiledevcohort2026.hashnode.dev·May 31 · 8 min readHow Instagram Stores Reels, Photos, and Drafts Behind the ScenesINTRODUCTION: Imagine this: You record a Reel on your phone. You add music, apply filters, trim clips, and then suddenly close the app or lose internet. Later, you reopen the app — and your draft is s00
PKPRINCE KUMARinmobiledevcohort2026.hashnode.dev·May 31 · 8 min readHow WhatsApp Works Without Internet: Offline Messaging and Sync ExplainedINTRODUCTION: Imagine this: You turn on airplane mode, open WhatsApp, and send: "Reached home 👍" Surprisingly: The message appears instantly in your chat It looks like it was sent You can contin00
