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Introduction The IT industry has always evolved rapidly. We moved from client-server systems to web applications, from monoliths to microservices, from data centers to cloud computing, and now into the…
Introduction As software systems grow, code often becomes difficult to maintain, extend, and test. New features introduce unexpected bugs, small changes require modifications in multiple places, and development velocity gradually…
MCQs Q1. Which JVM memory area stores objects? A. Stack B. Heap C. Method Area D. Program Counter Q2. What is Garbage Collection? A. Memory Allocation B. Memory Cleanup of…
Introduction One of the biggest challenges while interviewing Java developers is maintaining consistency across candidates. Many interviewers ask different questions to different candidates, making comparison difficult. This interview handbook provides:…
Introduction When interviewing Java developers, asking theoretical questions alone is rarely enough. The best interviews combine: Logical reasoning Problem-solving ability Understanding of loops and conditionals Character and string manipulation Collections…
Introduction Java 8 was one of the most revolutionary releases in Java history. It introduced Functional Programming concepts into Java and added several features that changed the way modern Java…
Introduction Exception handling is one of the most fundamental concepts in Java. Every Java developer uses exceptions daily, yet many developers struggle to explain: Why exceptions exist Difference between Exception…
Introduction In the previous articles, we built a reusable caching library that provides: L1 Cache using EhCache L2 Cache using Redis or GemFire Distributed Locking Cache Stampede Protection Cache Warming…
Introduction Caching is one of the most effective ways to improve application performance. Whether you are using EhCache, Redis, GemFire, or a multi-level caching strategy, one challenge remains consistent across…
Introduction In the previous article, we built a reusable caching library that provides: L1 Cache using EhCache L2 Cache using Redis or GemFire Strategy Pattern based provider selection Kafka and…
