How are you, hacker?
🪐 What’s happening in tech today, November 21, 2025?
The
HackerNoon Newsletter
brings the HackerNoon
homepage
straight to your inbox.
On this day,
Tesla launched the SUV Cybertruck in 2019, Albert Einstein’s mass energy equivalence was published in 1905, The first measurement of the speed of light in 1676,
and we present you with these top quality stories.
From
Twitch Joins Australia’s List of Platforms Blocked for Minors
to
How Search Engines Actually Answer Your Questions,
let’s dive right in.
How Search Engines Actually Answer Your Questions
By @superorange0707 [ 12 Min read ] Modern search QA explained: how knowledge graphs, DeepQA, and MRC turn messy web pages into direct, trustworthy answers. Read More.
Google Gemini File Search – The End of Homebrew RAG?
By @zbruceli [ 6 Min read ] Will Googles Gemini File Search kill homebrew RAG solutions? We test drive to compare function, performance and costs. Plus sample code for PDF QA app. Read More.
Twitch Joins Australia’s List of Platforms Blocked for Minors
By @techannouncements [ 1 Min read ] Australia will add Twitch to its under-16 social media ban taking effect Dec. 10, requiring platforms to block minor accounts or face major penalties. Read More.
Build a Custom ChatGPT App and Tap Into 800 Million Users
By @renalk [ 19 Min read ] Step by step manual for building an OpenAI ChatGPT App using MCP server and React widget. Read More.
How to Migrate Existing Azure Functions to the .NET 8 Isolated Worker Runtime
By @thatrajeevkr [ 5 Min read ] Step-by-step guide to upgrading existing Azure Functions to the .NET 8 isolated worker model for better performance, flexibility, and debugging. Read More.
🧑💻 What happened in your world this week?
It’s been said that
writing can help consolidate technical knowledge,
establish credibility,
and contribute to emerging community standards.
Feeling stuck? We got you covered ⬇️⬇️⬇️
ANSWER THESE GREATEST INTERVIEW QUESTIONS OF ALL TIME
We hope you enjoy this worth of free reading material. Feel free to forward this email to a nerdy friend who’ll love you for it.See you on Planet Internet! With love,
The HackerNoon Team ✌️
