Java Concurrency LLD: Mastering Lock-Free Magic with Atomic Operations & CAS

Java Concurrency LLD: Mastering Lock-Free Magic with Atomic Operations & CAS During my time interviewing candidates at Apple and Amazon, concurrency was the ultimate filter for senior engineering roles. Understanding how to build high-throughput, thread-safe systems without the heavy performance tax of traditional locking is what separates junior developers from staff-level engineers. The Mistake Most Candidates Make Over-using locks: Defaulting to heavy-handed synchroni