What is the difference between a stack and a queue?
Computer Science
ScanSolve AI Answer
Stack: LIFO (Last In, First Out). Operations: push (add to top), pop (remove from top), peek (view top). Think: stack of plates. Uses: undo/redo, function call stack, bracket matching, DFS. Queue: FIFO (First In, First Out). Operations: enqueue (add to back), dequeue (remove from front). Think: waiting in line. Uses: BFS, print queue, task scheduling. Both have O(1) time for insert/remove. Priority Queue: dequeues by priority, not order (uses heap).
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