A Queue is a linear data structure that follows the FIFO principle — First In, First Out. Like a line at a store: the first person in line is served first.
Operations:
enqueue(item) — add to back O(1)
dequeue() — remove from front O(1)
front() — view front O(1)
isEmpty() — check if empty O(1)
Applications:
- Task scheduling (CPU, printer)
- Breadth-First Search (BFS)
- Message buffers and event queues
- Rate limiting
- Order processing systems
Space Complexity: O(n) for n elements
Related algorithms
Frequently asked questions
- What is Queue?
- A Queue is a linear data structure that follows the FIFO principle — First In, First Out. Like a line at a store: the first person in line is served first.
- What is the complexity of Queue?
- Space: O(n)
- Who is this Queue visualizer for?
- The Queue visualization targets beginner-level learners in the Data Structures category. Useful for students, interview prep, and hands-on review.
- What algorithms are related to Queue?
- In the same category (Data Structures) you can explore: Stack, Linked List, Hash Table. Each has an interactive visualization.