Tushar Khanna (@iamtusharkhanna)

Mastering the Art of the Sliding Window Technique: A Step-by-Step Guide

Building intuition for the sliding window technique comes from understanding the core pattern and practicing it step by step. Here's how to develop that intuition: Understanding the Pattern This is the sliding window technique for finding the longest...

Jul 3, 2025 · 3 min readcodertushar.hashnode.dev

System Design of Google Docs: Real-Time Collaboration at Scale

Google Docs is a cloud-based document editor that enables multiple users to edit the same document simultaneously with a near-instantaneous view of each other’s changes. Delivering this seamless real-time collaboration experience to tens of millions ...

Jun 2, 2025 · 60 min readcodertushar.hashnode.dev

WebSockets for Frontend Developers: From Basics to Advanced

WebSockets are a powerful technology that enables real-time, two-way communication between a browser (client) and a server. Unlike traditional HTTP, which follows a request–response pattern, WebSockets keep a persistent connection open so that either...

Jun 2, 2025 · 23 min readcodertushar.hashnode.dev

Designing a Scalable Commenting System (Disqus-Like Platform)

Introduction A commenting platform (in the style of Disqus) is a third-party system that websites can integrate to enable discussion on their content. It allows users to post comments on articles or posts, reply to others in threaded conversations, a...

May 16, 2025 · 74 min readcodertushar.hashnode.dev

🔍 13 Frontend Interview Questions for Full-Stack Developers

1. How Does the Browser Render a Webpage? The Critical Rendering Path: HTML is parsed into a DOM CSS is parsed into a CSSOM Render Tree = DOM + CSSOM Layout: computes geometry Paint: pixels drawn Compositing: layers combined Optimize this pa...

May 8, 2025 · 3 min readcodertushar.hashnode.dev

Tushar Khanna

About

Available for

Tushar Khanna's blogs

Mastering the Art of the Sliding Window Technique: A Step-by-Step Guide

System Design of Google Docs: Real-Time Collaboration at Scale

WebSockets for Frontend Developers: From Basics to Advanced

Designing a Scalable Commenting System (Disqus-Like Platform)

🔍 13 Frontend Interview Questions for Full-Stack Developers

Tushar Khanna

About

Available for

Tushar Khanna's blogs

Mastering the Art of the Sliding Window Technique: A Step-by-Step Guide

System Design of Google Docs: Real-Time Collaboration at Scale

WebSockets for Frontend Developers: From Basics to Advanced

Designing a Scalable Commenting System (Disqus-Like Platform)

🔍 13 Frontend Interview Questions for Full-Stack Developers

Tushar Khanna

About

Available for

Tushar Khanna's blogs

Mastering the Art of the Sliding Window Technique: A Step-by-Step Guide

System Design of Google Docs: Real-Time Collaboration at Scale

WebSockets for Frontend Developers: From Basics to Advanced

Designing a Scalable Commenting System (Disqus-Like Platform)

🔍 13 Frontend Interview Questions for Full-Stack Developers

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Tushar Khanna

About

Available for

Tushar Khanna's blogs

Mastering the Art of the Sliding Window Technique: A Step-by-Step Guide

System Design of Google Docs: Real-Time Collaboration at Scale

WebSockets for Frontend Developers: From Basics to Advanced

Designing a Scalable Commenting System (Disqus-Like Platform)

🔍 13 Frontend Interview Questions for Full-Stack Developers