DSA
Priority Queue Basics
Understand the Priority Queue ADT, where elements are served based on priority rather than just arrival order.
By TechCoder TeamLast updated: 2026-06-02
In a Nutshell
Understand the Priority Queue ADT, where elements are served based on priority rather than just arrival order. This hands-on tutorial focuses on practical implementation of priority queue basics concepts.
Priority Queue
A Priority Queue is an Abstract Data Type (ADT) similar to a regular queue or stack, but where each element additionally has a "priority" associated with it.
Key Concepts
- In a priority queue, an element with high priority is served before an element with low priority.
- If two elements have the same priority, they are served according to their order in the queue.
- Implementation: Usually implemented using a Heap for $O(\log n)$ efficiency.
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Use Cases
- Dijkstra's Shortest Path algorithm.
- Huffman Coding (data compression).
- CPU Scheduling based on process importance.
- A Search Algorithm*.