Explain thread pool?

1.	Explain thread pool?
Answer» A Thread pool is simply a collection of pre-initialized or worker threads at the start-up that can be used to execute TASKS and put back in the pool when completed. It is referred to as pool threads in which a group of fixed-size threads is created. By REDUCING the number of application threads and managing their lifecycle, one can mitigate the issue of performance using a thread pool. Using threads, performance can be enhanced and better system stability can occur. To create the thread POOLS, java.util.concurrent.Executors class USUALLY provides FACTORY methods.

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