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Dev Cookies

Passionate developer crafting code and stories for a tech-infused world. Join me on the journey of innovation and growth.

Location India Joined Joined on  github website
🌲 Trie (Prefix Tree) Data Structure – Complete Guide with Java Code & LeetCode Questions
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🌲 Trie (Prefix Tree) Data Structure – Complete Guide with Java Code & LeetCode Questions

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3 min read
🌐 Graph Data Structure in Java — Complete Guide with Code, Concepts & Interview Q\&A
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🌐 Graph Data Structure in Java — Complete Guide with Code, Concepts & Interview Q\&A

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7 min read
💡 9 Killer DSA Patterns to Crack Any Coding Interview 🚀
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💡 9 Killer DSA Patterns to Crack Any Coding Interview 🚀

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3 min read
🌱 A Beginner's Guide to Functional Programming
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🌱 A Beginner's Guide to Functional Programming

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2 min read
🎯 `@Primary` vs `@Qualifier` in Spring – Which to Use and When?
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🎯 `@Primary` vs `@Qualifier` in Spring – Which to Use and When?

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2 min read
🚀 Complete Guide to Consuming APIs in Spring Boot
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🚀 Complete Guide to Consuming APIs in Spring Boot

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3 min read
The difference between `@RestController` and `@Controller`
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The difference between `@RestController` and `@Controller`

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1 min read
Spring WebFlux Reactive REST API project
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Spring WebFlux Reactive REST API project

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4 min read
🚀 Microservices Roadmap (2025 Edition – Enhanced for Modern Systems)
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🚀 Microservices Roadmap (2025 Edition – Enhanced for Modern Systems)

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2 min read
💻 Node.js Backend Developer Interview: Questions & Answers (With Explanations)
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💻 Node.js Backend Developer Interview: Questions & Answers (With Explanations)

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4 min read
Node.js Interview Guide tailored for backend developers, ranging from beginner to advanced levels
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Node.js Interview Guide tailored for backend developers, ranging from beginner to advanced levels

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2 min read
Must Know Sorting Algorithms
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Must Know Sorting Algorithms

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3 min read
🧠 Mastering Sorting of Pairs and Custom Objects in Java: A Complete Guide
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🧠 Mastering Sorting of Pairs and Custom Objects in Java: A Complete Guide

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3 min read
🚀 The Ultimate CEO Interview Guide for Tech Giants: Google, Meta, Microsoft & Beyond
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🚀 The Ultimate CEO Interview Guide for Tech Giants: Google, Meta, Microsoft & Beyond

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3 min read
🚀 How to Improve Database Performance: 12 Proven Techniques
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🚀 How to Improve Database Performance: 12 Proven Techniques

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3 min read
🧵 Apache Kafka vs. Kafka Streams: What's the Difference? How Do They Work Together?
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🧵 Apache Kafka vs. Kafka Streams: What's the Difference? How Do They Work Together?

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3 min read
🔄 Rotate Array in Java (Left & Right) Using Reverse Algorithm — Clean Code Explained
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🔄 Rotate Array in Java (Left & Right) Using Reverse Algorithm — Clean Code Explained

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3 min read
🎯 Trade-offs in System Design: Why You Can't Have It All!
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🎯 Trade-offs in System Design: Why You Can't Have It All!

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3 min read
Part 2: Node Js Backend CRUD based template
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Part 2: Node Js Backend CRUD based template

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3 min read
Part 1: Node Js Clean Backend CRUD Template
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Part 1: Node Js Clean Backend CRUD Template

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3 min read
🏢 How an Employee Management App Works: Microservices, Communication Styles, and the Full Workflow
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🏢 How an Employee Management App Works: Microservices, Communication Styles, and the Full Workflow

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3 min read
🍕 How a Food Delivery App Works Behind the Scenes: Microservices, Communication, and Flow Explained
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🍕 How a Food Delivery App Works Behind the Scenes: Microservices, Communication, and Flow Explained

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3 min read
📦 From Selecting an Item to Getting it Delivered: Microservices, Communication Patterns, and Flow Explained
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📦 From Selecting an Item to Getting it Delivered: Microservices, Communication Patterns, and Flow Explained

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3 min read
LRU and LFU Java code *
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LRU and LFU Java code *

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4 min read
Understanding Service Mesh Architecture: A Complete Guide
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Understanding Service Mesh Architecture: A Complete Guide

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3 min read
📈 Spring Boot Actuator and Micrometer: Monitoring Made Easy!
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📈 Spring Boot Actuator and Micrometer: Monitoring Made Easy!

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3 min read
🚀 Frontend Performance Optimization Checklist: A one-stop solution to master Core Web Vitals
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🚀 Frontend Performance Optimization Checklist: A one-stop solution to master Core Web Vitals

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2 min read
🚪🔐 OAuth Isn’t Your Login System — Here’s Why (and What You Should Use Instead)
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🚪🔐 OAuth Isn’t Your Login System — Here’s Why (and What You Should Use Instead)

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3 min read
Axios and Fetch template for CRUD
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Axios and Fetch template for CRUD

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🧠 SonarQube: What It Is, Why You Need It, and the Data It Gives About Your Code
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🧠 SonarQube: What It Is, Why You Need It, and the Data It Gives About Your Code

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3 min read
🚀 Designing Idempotent APIs in Spring Boot
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🚀 Designing Idempotent APIs in Spring Boot

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2 min read
🧼 Code Smells: What They Are, Why They Matter, and How to Fix Them
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🧼 Code Smells: What They Are, Why They Matter, and How to Fix Them

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3 min read
🚀 Crack Coding Interviews with These Must-Know Patterns
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🚀 Crack Coding Interviews with These Must-Know Patterns

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2 min read
Comprehensive Guide to Popular Design Patterns in Java🧩💻
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Comprehensive Guide to Popular Design Patterns in Java🧩💻

#designpatter #javadesignpattern
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4 min read
📝 Day Ten: Strategy Design Pattern in Java
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📝 Day Ten: Strategy Design Pattern in Java

#designpatterns #system #systemdesign #java
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4 min read
📝 Day Nine: State Design Pattern in Java
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📝 Day Nine: State Design Pattern in Java

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📝 Day Eight: Chain of Responsibility Design Pattern in Java
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📝 Day Eight: Chain of Responsibility Design Pattern in Java

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3 min read
📝 Day Seven: Facade Design Pattern in Java
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📝 Day Seven: Facade Design Pattern in Java

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📝 Day Six: Adapter Design Pattern in Java
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📝 Day Six: Adapter Design Pattern in Java

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📝 Day Five: Strategy Design Pattern in Java
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📝 Day Five: Strategy Design Pattern in Java

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📝 Day Four: Decorator Design Pattern in Java
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📝 Day Four: Decorator Design Pattern in Java

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📝 Day Three: Singleton Design Pattern in Java
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📝 Day Three: Singleton Design Pattern in Java

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📝 Day Two: Builder Design Pattern in Java
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📝 Day Two: Builder Design Pattern in Java

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📝 Day One: Factory Design Pattern in Java
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📝 Day One: Factory Design Pattern in Java

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🚀 Master DSA Patterns to Ace Coding Interviews!
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🚀 Master DSA Patterns to Ace Coding Interviews!

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4 min read
💡 Mastering Dynamic Programming: Patterns and Techniques
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💡 Mastering Dynamic Programming: Patterns and Techniques

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5 min read
🧩 Understanding Backtracking with Java Code Examples
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🧩 Understanding Backtracking with Java Code Examples

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6 min read
🌐 Understanding Matrix Traversal with Java Code Examples
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🌐 Understanding Matrix Traversal with Java Code Examples

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5 min read
🌐 Understanding Breadth-First Search (BFS) with Java Code Examples
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🌐 Understanding Breadth-First Search (BFS) with Java Code Examples

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5 min read
🔍 Understanding Depth-First Search (DFS) with Java Code Examples
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🔍 Understanding Depth-First Search (DFS) with Java Code Examples

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5 min read
🌳 Mastering Binary Tree Traversal (with Java Code Examples)
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🌳 Mastering Binary Tree Traversal (with Java Code Examples)

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5 min read
🔍 Mastering the Binary Search Pattern (with Java Code Examples)
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🔍 Mastering the Binary Search Pattern (with Java Code Examples)

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5 min read
🔁 Mastering the Overlapping Intervals Pattern in Coding Interviews (with Java)
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🔁 Mastering the Overlapping Intervals Pattern in Coding Interviews (with Java)

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3 min read
🚀 Mastering the Top ‘K’ Elements Pattern – With Java Code
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🚀 Mastering the Top ‘K’ Elements Pattern – With Java Code

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3 min read
🔁 Linked List In-Place Reversal in Java – A Step-by-Step Guide
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🔁 Linked List In-Place Reversal in Java – A Step-by-Step Guide

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2 min read
🐢🐇 Fast and Slow Pointers in Java – The Ultimate Guide
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🐢🐇 Fast and Slow Pointers in Java – The Ultimate Guide

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3 min read
🔍 Sliding Window Technique in Java – The Ultimate Guide 🚪
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🔍 Sliding Window Technique in Java – The Ultimate Guide 🚪

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3 min read
🏃‍♂️🏃‍♀️ Two Pointer Technique in Java – The Ultimate Guide with Examples
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🏃‍♂️🏃‍♀️ Two Pointer Technique in Java – The Ultimate Guide with Examples

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2 min read
🧮 Mastering Prefix Sum in Java – The Ultimate Guide with Real Examples
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🧮 Mastering Prefix Sum in Java – The Ultimate Guide with Real Examples

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3 min read
🧱 Mastering the Monotonic Stack Pattern in Java – With Real-World Examples
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🧱 Mastering the Monotonic Stack Pattern in Java – With Real-World Examples

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3 min read
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