Rahul Kumar

ES5 vs. ES6: The Evolution of JavaScript from Vintage to Modern

JavaScript, the language that powers the web, keeps evolving. Think of it like upgrading from an old flip phone (ES5) to a sleek smartphone…

DSA Day 34/250: Longest Palindromic Substring (LeetCode 5)

Master the longest palindromic substring using the optimal expand-around-center technique with full iteration clarity.

DSA Day 11/250: Max Consecutive Ones (LeetCode 485)

This problem is not about counting 1s. It’s about knowing exactly when to reset and when to record your result.

From Physical Servers to the Cloud: Everything You Need to Know Before Starting Your AWS Journey

[Click here to read for free.]

AWS VPC Explained Through a Village Story: Subnets, Gateways and Security Groups Without the Jargon

What if VPC wasn’t scary at all? A story about a village, a gate, and why AWS builds your cloud the exact same way.

DSA Day 94/250: Kth Smallest Element in a Sorted Matrix (LeetCode 378)

Find the kth smallest element efficiently using binary search on answer space.

Functional Error Handling in Java Using Vavr with Spring Boot

It seems functional programming has not got the respect it deserved and the one prime reason to it is that there is a learning curve…

DSA Day 95/250: Find K Pairs with Smallest Sums (LeetCode 373)

Find the k pairs with the smallest sums using a min heap and sorted array properties.

Fuzzing GET and POST Requests: A Comprehensive Guide with Gobuster, Ffuz, and Wfuzz

Web applications have become an essential part of businesses and individuals’ daily lives. However, they are also vulnerable to attacks…

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Agentic AI Orchestration for Full‑Stack Developers: Comparing AutoGen, CrewAI, LangFlow, Flowise…

Building Agentic AI systems — where AI agents can autonomously reason, use tools, and collaborate to accomplish goals — is becoming much…

DataWeave 2.0 Tutorial: Advanced Transformations and Real-World Examples

If we’ve been working with MuleSoft for a while, chances are we’re already comfortable with map, filter, and pluck. Transforming JSON to…

DSA Day 93/250: K Closest Points to Origin (LeetCode 973)

Find the k closest points to the origin efficiently using a max heap.

B.Sc Maths Colleges in Bareilly

B.Sc Physics, Chemistry, Mathmatics — Check our B.Sc Physics, Chemistry, Math course details, eligibility criteria, fees and admission…

Best WhatsApp Chatbots for Businesses: 8 Tools Worth Considering

There was a time when I used to think of WhatsApp chatbots as simple auto-reply tools.

Best RCS Messaging Platforms for Startups and SMEs in India

Business messaging is changing fast.

Security Groups vs NACLs: The Last Line of Defense in Your AWS VPC

Two checkpoints stand between your app and a hacker: security groups and NACLs. Here’s how each one works, with a hands-on test.

Best Sales Management Software for Manufacturing Businesses in India (2026)

Manufacturing sales cycles in India look nothing like retail or SaaS sales cycles. A single deal can involve multiple decision-makers…

I Cracked Amazon ML Summer School Last Year. Here’s Your Blueprint for 2026.

Get the exact math syllabus, coding questions, and 14-day study plan to clear the Amazon ML Summer School 2026 assessment on Unstop.

Best Lead Management Software for Small Business in India 2026

A sales manager at a Pune-based textile export firm once told me something that stuck: “We were getting 80 inquiries a week from IndiaMART…

5 Best Order Management Software for Textile Traders in 2025

Managing orders in the textile trade is anything but simple. Between bulk purchase orders, multiple fabric SKUs, seasonal demand swings…

What is CRM Software and Why Every Indian Business Needs It in 2026

As someone who has worked closely with Indian SMEs and startup founders navigating rapid digital change, I’ve seen one pattern repeat…

How Can Businesses Use A/B Testing to Improve WhatsApp Campaign Performance?

WhatsApp campaigns often involve small decisions that can significantly affect performance.

Why Indian Businesses Need Inventory Management Software with CRM Integration in 2026

India’s small and medium businesses are no longer just experimenting with digital tools, they are being pushed toward them by tightening…

How to Choose the Right Lead Management CRM Software for Your Sales Team

Every sales team eventually hits the same wall: leads are coming in, but they’re falling through the cracks. A prospect fills out a form…