---
title: "Janmejai Singh (@janmejaisingh) | Hashnode"
description: "Where MERN meets mirth—crafting digital dreams with a wink and a line of code. Read the latest articles by Janmejai Singh on Hashnode."
url: "https://hashnode.com/@janmejaisingh"
---

@janmejaisingh

# Janmejai Singh

@janmejaisingh · India · Joined April 2022

Where MERN meets mirth—crafting digital dreams with a wink and a line of code.

### [Where RAG Fails: Understanding the Limitations of Retrieval-Augmented Generation](https://cyd3er.hashnode.dev/where-rag-fails-understanding-the-limitations-of-retrieval-augmented-generation?utm_source=hashnode&utm_medium=feed)

Where RAG Fails: Understanding the Limitations of Retrieval-Augmented Generation

10 min read · [cyd3er.hashnode.dev](https://cyd3er.hashnode.dev/where-rag-fails-understanding-the-limitations-of-retrieval-augmented-generation?utm_source=hashnode&utm_medium=feed)

[Jul 19](https://hashnode.com/posts/where-rag-fails-understanding-the-limitations-of-retrieval-augmented-generation/6a5ca2420f626f043e54050b)

### [How ChatGPT Understands Your Questions: The Science Behind the Magic](https://cyd3er.hashnode.dev/how-chatgpt-understands-your-questions-the-science-behind-the-magic?utm_source=hashnode&utm_medium=feed)

How ChatGPT Understands Your Questions: The Science Behind the Magic

10 min read · [cyd3er.hashnode.dev](https://cyd3er.hashnode.dev/how-chatgpt-understands-your-questions-the-science-behind-the-magic?utm_source=hashnode&utm_medium=feed)

[Jul 1](https://hashnode.com/posts/how-chatgpt-understands-your-questions-the-science-behind-the-magic/6a44fac9f93abb94be79c193)

### [What is Middleware in Express and How It Works](https://cyd3er.hashnode.dev/what-is-middleware-in-express-and-how-it-works?utm_source=hashnode&utm_medium=feed)

What is Middleware in Express and How It Works

8 min read · [cyd3er.hashnode.dev](https://cyd3er.hashnode.dev/what-is-middleware-in-express-and-how-it-works?utm_source=hashnode&utm_medium=feed)

[Jun 30](https://hashnode.com/posts/what-is-middleware-in-express-and-how-it-works/6a43f5f83457cabfd78e8f6e)

### [Sessions vs JWT vs Cookies: Understanding Authentication Approaches](https://cyd3er.hashnode.dev/sessions-vs-jwt-vs-cookies-understanding-authentication-approaches?utm_source=hashnode&utm_medium=feed)

Sessions vs JWT vs Cookies: Understanding Authentication Approaches

8 min read · [cyd3er.hashnode.dev](https://cyd3er.hashnode.dev/sessions-vs-jwt-vs-cookies-understanding-authentication-approaches?utm_source=hashnode&utm_medium=feed)

[Jun 30](https://hashnode.com/posts/sessions-vs-jwt-vs-cookies-understanding-authentication-approaches/6a43f447b7a0d0dd872d4e65)

### [DNS Record Types Explained: The Phonebook Behind Every Website You Visit](https://cyd3er.hashnode.dev/dns-record-types-explained-the-phonebook-behind-every-website-you-visit?utm_source=hashnode&utm_medium=feed)

DNS Record Types Explained: The Phonebook Behind Every Website You Visit

9 min read · [cyd3er.hashnode.dev](https://cyd3er.hashnode.dev/dns-record-types-explained-the-phonebook-behind-every-website-you-visit?utm_source=hashnode&utm_medium=feed)

[Jun 30](https://hashnode.com/posts/dns-record-types-explained-the-phonebook-behind-every-website-you-visit/6a43ea9db2579dda4fcd863e)