What is the difference between a stack and a queue? Give an example where you would use each.

Question

Accepted Answer

A stack is a LIFO data structure while a queue is a FIFO data structure.

Stack: Last In First Out (LIFO), used in undo/redo functionality, backtracking, and recursion.
Queue: First In First Out (FIFO), used in job scheduling, breadth-first search, and printing.
Stack uses push() and pop() operations while queue uses enqueue() and dequeue() operations.

Accepted Answer

In computer science, a stack is an abstract data type that serves as a collection of elements, with two main operations: Push, which adds an element to the collection, and. Pop, which removes the most recently added element that was not yet removed. a line of people, cars, etc. that are waiting for something or to do something.

Accepted Answer

stack is a LIFO data structure while a queue is a FIFO data structure. Stack: Last In First Out (LIFO), used in undo/redo functionality, backtracking, and recursion. Queue: First In First Out (FIFO), used in job scheduling, breadth-first search, and printing. Stack uses push() and pop() operations while queue uses enqueue() and dequeue() operations.

Accepted Answer

stack is a LIFO data structure while a queue is a FIFO data structure. Stack: Last In First Out (LIFO), used in undo/redo functionality, backtracking, and recursion. Queue: First In First Out (FIFO), used in job scheduling, breadth-first search, and printing. Stack uses push() and pop() operations while queue uses enqueue() and dequeue() operations.

Accepted Answer

The primary difference between Stack and Queue Data Structures is that Stack follows LIFO while Queue follows FIFO data structure type. LIFO refers to Last In First Out. It means that when we put data in a Stack, it processes the last entry first. Conversely, FIFO refers to First In First Out

Accepted Answer

A stack and a queue are both abstract data types used to store and manage collections of elements, but they differ in the way elements are inserted and removed from them.

In a stack, the last element added is the first element to be removed. This is known as Last-In-First-Out (LIFO) behavior. You can think of a stack as a pile of books where the last book added to the pile is the first one to be removed.

On the other hand, a queue follows First-In-First-Out (FIFO) behavior, where the first element added is the first element to be removed. You can think of a queue as a line of people waiting to buy tickets, where the first person in line is the first one to get the ticket.

Example use cases for each:

Stack: A classic example of a stack is the "Undo" feature in a text editor. Every time you make a change to the document, the old state is saved on the stack. When you hit "Undo," the last saved state is popped off the stack and the document reverts to that state.

Queue: A queue is useful when you need to process data in the order it arrives. For example, when processing print jobs on a printer, you would use a queue to ensure that the jobs are processed in the order they are received.

What is the difference between a stack and a queue? Give an example where you would use each.

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