Multithreading Deep Dive with Rakesh kumar

In this deep-dive session, we will demystify the complexities of concurrent programming. You will master how to write efficient, thread-safe, and high-performance Java applications while breaking down the exact concurrency questions asked in FAANG and tier-1 tech interviews.

Topics Covered

✅ Threading Fundamentals: Thread Lifecycle, Creation (Thread vs. Runnable vs. Callable), and ThreadLocal storage.

✅ Java Memory Model (JMM): Understanding CPU Caches, Instruction Reordering, volatile keyword, and Happens-Before guarantees.

✅ Thread Synchronization: Deadlocks, Livelocks, Starvation, synchronized blocks, and Object Monitors (wait(), notify(), notifyAll()). ✅ Advanced Lock Utility: ReentrantLock, ReadWriteLock, StampedLock, and Condition variables.

✅ Concurrency Framework (java.util.concurrent): Internal working of ExecutorService, Thread Pools (Fixed, Cached, Scheduled), and ForkJoinPool.

✅ Thread-Safe Collections & Synchronizers: ConcurrentHashMap (Segmentation vs. CAS Architecture), CopyOnWriteArrayList, CountDownLatch, CyclicBarrier, and Semaphore.

✅ Atomic Operations: Lock-free programming, Compare-And-Swap (CAS) mechanics, and AtomicInteger / LongAdder internals. ✅ CompletableFuture & Reactive Patterns: Asynchronous non-blocking pipelines, exception handling in async blocks, and task chaining.

✅ Coding & Interview Scenarios: Implementing custom Thread Pools, solving Producer-Consumer patterns, and analyzing thread dumps for performance tuning.

Who Should Join?

• Backend Engineers (1–10+ Years Exp): Looking to master low-latency and high-throughput system design.
• Interview Candidates: Preparing for senior/lead Java technical screening and system design rounds.
• Software Developers: Struggling to debug race conditions, memory leaks, and thread leaks in production.
• Architects: Aiming to optimize resource utilization and transition applications to modern Virtual Threads.

What You'll Get

✔ Personalized 1:1 Technical Mentoring: Tailored completely to your current experience level.

✔ Production-Scale Examples: No textbook snippets—we look at real-world backend bottleneck scenarios.

✔ Interview-Engineered Explanations: Deep dives into why framework designers made specific architectural choices.

✔ Interactive Code Debugging: Live troubleshooting of complex race conditions and thread deadlocks.

✔ Custom Multi-Threading Roadmap: A step-by-step framework to transition from standard synchronous code to advanced concurrent architecture.