A stack follows the LIFO (Last In First Out) principle, where the last element added is the first one removed, making it suitable for DFS and undo operations; a queue follows the FIFO (First In First Out) principle, where the first element added is the first one removed, making it suitable for BFS and scheduling tasks.
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Every interviewer asks stack versus queue. Every time, here is the answer.
Stack is LIFO, last in first out. Queue is FIFO, first in first out. DFS [music] and undo hit a stack. BFS and scheduling hit a queue. Follow for more patterns like this.
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