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What is FIFO approach?

Updated: 8/11/2023
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13y ago

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FIFO is the acronym for First In First Out, which means Use (or do) the Oldest Stuff First, or use things in the order of their arrival.

Two common contexts for this are in accounting and computing.

FIFO is also used in inventory and in stocking shelves where the items that are received first should be used first and old items are shelved in front and new items in the back.

It is a materials management technique in Warehousing, Fruit & Vegetable stores, Butcher shops, etc. and handling incoming mail in offices.

It is all about making sure things flow through a system properly, where older items are used before items that have just come in.

Technically, FIFO is a means of describing a queue-like data sequence, where insertions (push operations) occur at the end of the sequence and extractions (pop operations) occur at the beginning of the sequence. As opposed to a LIFO (last-in, first-out) sequence where all pushes and pops occur at the end of the sequence, thus creating a stack-like data sequence. LIFO can also be called FILO (first-in, last-out), which means the same thing.

In other words, with FIFO, we pop objects off the sequence in the same order they were pushed onto it, but with LIFO/FILO we pop objects in the reverse order they were pushed.

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6y ago
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9y ago

An impossibility. Stacks are last in, first out (LIFO) structures. FIFO is first in, first out, which defines a queue structure, not a stack.

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13y ago

FIFO represents an approach to handling data most commonly used in the data structure queue. It stands for First-In-First-Out. Data that enters the queue first leaves it first.

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