What is the Queues in DSA with Free Notes

What is the Queues ???

Queues are the necessary Data Structure, Because it is operating on the First In, First Out (FIFO) principle. This, means that the first element added to the queue will be the first one to be removed.

Key Operations on Queue

1. Enqueue: – It is used for adding an element to the end of the queue.
2. Dequeue: – This is used for removing the front element from the Queue.
3. Front (or Peek ): – It retrieving he front element without removing it.
4. isEmpty: – It checks if the Queue is Empty.

Types

1. Simple Queue: – It Operates on a basic FIFO Principle with no additional feature.
2. Circular Queue:- The last position is connected back to the first position to make a circle, optimizing space usage.
3. Priority Queue: – Each Element is associated with a priority. Elements with higher priority are dequeued before those with lower priority.
4. Dequeue (Double-Ended Queue): – Elements can be added or removed from both ends, offering more flexibility.