|Introduction to Queues|
|A queue is a data structure that follows the first-in, first-out (FIFO) principle.|
Queues are used to manage and process data in a sequential order.
Elements are added to the back of the queue and removed from the front.
|Enqueue: Adding an element to the back of the queue.|
Dequeue: Removing the element from the front of the queue.
Peek: Viewing the element at the front without removing it.
|Waiting in line at a grocery store checkout.|
Handling print jobs in a printer.
Processing messages in a messaging app.
|Implementation of Queues|
|Queues can be implemented using arrays or linked lists.|
Arrays provide constant-time access to elements.
Linked lists allow dynamic resizing and efficient insertion/ removal.
|Types of Queues|
|Linear Queue: A simple queue with a fixed size.|
Circular Queue: A queue that wraps around to the beginning when reaching the end.
Priority Queue: Assigns a priority value to each element and processes them accordingly.
|Enqueue operation: O(1) - Constant time complexity.|
Dequeue operation: O(1) - Constant time complexity.
Peek operation: O(1) - Constant time complexity.
|Task scheduling in operating systems.|
CPU scheduling algorithms.
|Advantages of Queues|
|Ensures fairness by following the FIFO principle.|
Efficient for managing data in a sequential order.
Can be easily implemented and understood.
|Limitations of Queues|
|Fixed size queues have limited capacity.|
Linear queues can cause memory wastage.
Priority queues can be complex to implement.
|Queues are a fundamental data structure with various real-life applications.|
They follow the FIFO principle and are efficient for managing data in a sequential order.
Queues can be implemented using arrays or linked lists, and different types of queues exist for specific use cases.