Category: Java interview questions

Executor is a simple interface in Java that defines a single method execute(Runnable command) for executing a task in a background thread. It is the simplest interface for asynchronous processing…

CachedThreadPool is a type of thread pool executor in Java that creates new threads as required to execute submitted tasks, and reuse previously created threads when they become available. It…

The ScheduledThreadPoolExecutor is a class that extends ThreadPoolExecutor and provides functionality for scheduling tasks to run after a specified delay or at a fixed rate. It is useful for scheduling…

The FixedThreadPoolExecutor is a type of ThreadPoolExecutor in the Executor framework that executes each submitted task using one of a fixed number of threads. It maintains a pool of threads…

In Java, CachedThreadPool and FixedThreadPool are two implementations of the ExecutorService interface that can be used to manage a pool of threads for executing tasks concurrently. CachedThreadPool creates new threads…

Deadlock is a situation where two or more threads are blocked waiting for each other to release the locks they hold, resulting in a deadlock state where none of the…

Achieving task ordering with the Executor framework can be done in a few ways: Using a SingleThreadExecutor: If you create an instance of SingleThreadExecutor, it will execute tasks sequentially in…

There are several implementations of the ExecutorService interface in Java that allow you to create different types of thread pools to execute tasks in parallel. Here are some common implementations:…

CompletionService is a useful interface in the Java concurrency framework that allows you to efficiently process the results of asynchronous tasks as they become available. You can use CompletionService when…

ExecutorService and CompletionService are both interfaces in the Java concurrency framework that provide a way to execute tasks asynchronously in a multithreaded environment. However, they serve different purposes. ExecutorService provides…