Chapters 10 and 11 includes 27 problems that involve Java concurrency. It starts with fundamental problems about threads lifecycle and object/class level locking. It continues with a bunch of problems about thread pools in Java including JDK 8 work-stealing thread pool. Afterwards, we have problems dedicated to Callable, Future and CompletableFuture. Next, we dedicate several problems to Java synchronizers (e.g., barrier, semaphore, exchanger, etc). Finally, we have problems for fork/join framework, ReentrantLock, ReentrantReadWriteLock, StampedLock, atomic variables, tasks cancellation, interruptible methods, and deadlocks.