## What is priority queue in analysis of algorithm?

In computer science, a priority queue is an abstract data-type similar to a regular queue or stack data structure in which each element additionally has a “priority” associated with it. In a priority queue, an element with high priority is served before an element with low priority.

**Which algorithms use a priority queue?**

Algorithms: Certain foundational algorithms rely on priority queues, such as Dijkstra’s shortest path algorithm, prim’s algorithm, and heap sort algorithm, etc. Data compression: It is used in data compression techniques like Huffman code.

### How is priority determined in a priority queue?

In Priority queue items are ordered by key value so that item with the lowest value of key is at front and item with the highest value of key is at rear or vice versa. So we’re assigned priority to item based on its key value. Lower the value, higher the priority.

**What is Max priority queue?**

1. Max Priority Queue. In a max priority queue, elements are inserted in the order in which they arrive the queue and the maximum value is always removed first from the queue. For example, assume that we insert in the order 8, 3, 2 & 5 and they are removed in the order 8, 5, 3, 2.

#### What is the advantage of priority queue?

The major advantage of using a priority queue is that you will be able to quickly access the highest priority item with a time complexity of just O(1). The only disadvantage of using Priority Queues are that the enqueue and dequeue operations are slow and have a time complexity of O(log n).

**What is the significance of priority queue?**

The priority queue (also known as the fringe) is used to keep track of unexplored routes, the one for which a lower bound on the total path length is smallest is given highest priority.

## What is the most common implementation of a priority queue?

binary heaps

Priority queues are often implemented using binary heaps.

**What is max and min priority queue?**

Thus, a max-priority queue returns the element with maximum key first whereas, a min-priority queue returns the element with the smallest key first. Priority queues are used in many algorithms like Huffman Codes, Prim’s algorithm, etc. It is also used in scheduling processes for a computer, etc.

### What are the ADT for priority queue?

The ADT defines what a Priority Queue should be able to do and the Data Structure is its implementation. To have in mind: Priority Queues are usually implemented with a Heap data structure, there are different types of Heap as Binary Heap, Fibonacci Heap, Binominal Heap, and Pairing Heap.