---
title: "Devadath KV (@devadathkv) | Hashnode"
description: "Explaining tech in simple words. Read the latest articles by Devadath KV on Hashnode."
url: "https://hashnode.com/@devadathkv"
---

@devadathkv

# Devadath KV

@devadathkv · Joined February 2026

Explaining tech in simple words

### [Apex API](https://oauth-20.hashnode.dev/apex-api?utm_source=hashnode&utm_medium=feed)

Learn what an API is and how to use GET, POST, PUT, and DELETE requests with Postman and JavaScript fetch(). A beginner-friendly guide with examples using A

7 min read · [oauth-20.hashnode.dev](https://oauth-20.hashnode.dev/apex-api?utm_source=hashnode&utm_medium=feed)

[Feb 12](https://hashnode.com/posts/apex-api/698df040dd934e70dd50225f)

### [CORS explained simply](https://oauth-20.hashnode.dev/cors-explained-simply?utm_source=hashnode&utm_medium=feed)

Intro If you’re a developer, you must’ve already built many platforms that require API calls and one of the most common errors developers encounter is: Access to fetch at '...' has been blocked by CORS policy This message appears when the browser blo...

3 min read · [oauth-20.hashnode.dev](https://oauth-20.hashnode.dev/cors-explained-simply?utm_source=hashnode&utm_medium=feed)

[Feb 8](https://hashnode.com/posts/cors-explained-simply/69882df9c2f742b91a190a68)

### [OAuth 2.0](https://oauth-20.hashnode.dev/oauth-20?utm_source=hashnode&utm_medium=feed)

Intro If you’ve ever clicked “Continue with Google” or “Login with GitHub”, then congratulations — you’ve already used OAuth 2.0 in real life. In this blog, I’ll help you understand what this stuff is and how it has currently changed the authorizatio...

2 min read · [oauth-20.hashnode.dev](https://oauth-20.hashnode.dev/oauth-20?utm_source=hashnode&utm_medium=feed)

[Feb 5](https://hashnode.com/posts/oauth-20/6984dcd9559eb2d777b15a67)