Now that we have a good understanding of queues and their implementations, let's explore some real-world applications where queues can be useful.

Real-World Applications of Queues

1. Process Scheduling: Queues are extensively used in operating systems for process scheduling. In an operating system, multiple processes are waiting to be executed. The operating system maintains a queue of processes, and each process gets CPU time based on its priority and the order in which it arrived in the queue.

2. Web Servers: Queues are used in web servers to handle incoming requests. When a web server receives a request, it adds the request to a queue and processes it in a first-come, first-served manner. This ensures that the server can handle multiple requests without overwhelming its resources.

3. Breadth-First Search (BFS): BFS is a graph traversal algorithm that uses a queue to explore all the vertices in a graph. It starts from a given vertex, visits all its neighbors, and then visits their neighbors in a level-by-level manner.

4. Print Spooling: In a printing system, when multiple print jobs are sent to a printer, they are stored in a queue. The printer then processes the jobs in the order they were received, ensuring that all jobs are printed without any interference.

5. Call Center Phone System: In a call center, incoming calls are often put on hold until a customer service representative becomes available. The calls are typically placed in a queue and handled on a first-come, first-served basis.

These are just a few examples of the many real-world applications where queues play a vital role. As you can see, queues are versatile data structures that can be used to manage and process various types of tasks in a systematic and organized manner.

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class Main {

  public static void main(String[] args) {

    // replace with your Java logic here

    Queue<String> queue = new LinkedList<>();

    // Enqueue elements to the queue

    queue.add("Alice");

    queue.add("Bob");

    queue.add("Charlie");

    queue.add("Dave");

    // Dequeue elements from the queue

    while (!queue.isEmpty()) {

      String person = queue.remove();

      System.out.println("Processing " + person + "...");

      // replace with your custom logic here

    }

  }

}