Practice & Challenges
Sharpen your engineering intuition with production-grade interview questions and hands-on coding challenges.
Core Java, multi-threading, concurrency locks, stream API, and memory model problems.
Scalability, caching strategies, rate limiters, database sharding, and fault tolerance.
Service discovery, circuit breakers, saga patterns, event-driven architectures, and API gateways.
State management, hooks internals, SSR vs CSR, performance optimization, and custom hooks.
EC2, ECS, Lambda, IAM policies, VPC subnetting, and high availability design patterns.
Query optimization, indexing strategies (B-Tree, GIN), locking, isolation levels, and vacuuming.
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