What is the function of the newFixedThreadPool(int nThreads) method(s) of the Executors class of the java.util.concurrent package?
Answer: Creates a thread a pool that reuses a fixed number of worker threads; if a new task is submitted when all the worker threads are still executing, it will be placed into the queue until a worker thread is available
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Multithreading and Concurrent Processing
- What is the advantage of using concurrent collections from the java.util.concurrent package instead of a regular property?
- Where in the JCL can alternate forms of threading locks be found?
- How does a synchronized block improve performance compared to using the synchronized keyword?
- What is one positive and negative aspect of using the synchronized keyword to prevent concurrent access issues?
- How does the Exchanger class of the concurrent package support synchronization between threads?
- How does the Phaser class of the concurrent package support synchronization between threads?
- How does the CyclicBarrier class of the concurrent package support synchronization between threads?
- How does the CountDownLatch class of the concurrent package support synchronization between threads?
- How does the Semaphore class of the concurrent package support synchronization between threads?
- What is an Atomic variable (from the java.util.concurrent.atomic package) and how does it prevent concurrent access issues?
- What is one of the dangers of concurrent access and modification of a property?
- What is a deadlock, and what causes it?
- What is the difference between concurrent and parallel processing in computer science?
- What is the function of the Future submit(Callable task) method of the ExecutorService interface?
- What is the function of the Future<?> submit(Runnable task, T result) method of the ExecutorService interface?
- What is the function of the Future<?> submit(Runnable task) method of the ExecutorService interface?
- What is the purpose of the Future type objects that are returned from some of the ExecutorService methods?
- What is the function of the boolean isCancelled() method of the Future interface?
- What is the function of the boolean cancel(boolean mayInterruptIfRunning) method of the Future interface?
- What is the function of the boolean isDone() method of the Future interface?
- What is the function of the V get() and V get(long timeout, TimeUnit unit) methods of the Future interface?
- List and explain all the parameters for the following constructor of the ThreadPoolExecutor.
- What cycle can be applied to best optimize the pool size based on the individual computer?
- What are the dangers of having a pool that is too big or too small?
- How do you ensure that isInterrupted() actually reflects the status of the thread?
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