juniorQueues
What is a Deque (Double-Ended Queue)?
Updated Apr 28, 2026
Short answer
A queue that allows insertion and deletion from both the front and the rear.
Deep explanation
Queues are fundamental in managing sequential tasks. A queue that allows insertion and deletion from both the front and the rear. They ensure fairness and order by processing items as they arrive.
Real-world example
Printer job management.
Common mistakes
- Popping from the end of an array instead of the front (behaving like a stack).
Follow-up questions
- What is FIFO?