Backend Interview
Preparation Hub
Your structured, interview-oriented guide to mastering backend development,
system design, and core computer science concepts.
Core Java & OOPs
Deep-dive into JVM, memory management, multithreading, collections, exception handling, and Java 8+ features with interview-ready answers.
ExploreSystem Design
Learn building blocks like load balancers, caches, queues, and CDNs. Practice with real-world designs for YouTube, WhatsApp, and more.
ExploreLow-Level Design
12 classic LLD problems with full Java implementations — parking lot, elevator, vending machine, cache system, and more.
ExploreMicroservices & Spring Boot
From monolith-to-microservices migration to service discovery, configuration management, and production-ready Spring Boot patterns.
ExploreDatabases & Caching
SQL vs NoSQL decision guide, Redis, Elasticsearch, DynamoDB — understand when and why to pick each technology.
ExploreLast-Week Interview Revision
Curated masterlist of 200+ frequently asked Q&As across Java, microservices, Spring Boot, Kafka, AWS, and distributed systems.
ExploreHow to Use This Resource
Use the sidebar to navigate Java, System Design, LLD, Microservices, and more — all organized by category.
Press Ctrl+K to search across all 120+ articles. Find any topic in under a second.
Every article is structured as Q&A with concise, interview-ready answers you can recall under pressure.
Use the Interview Masterlist for a 1000+ Q&A rapid-fire revision session the week before your interview.