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What is First In First Out (FIFO) in Operating System? PDF Download

Learn First In First Out (FIFO) definition in operating system with explanation to study “What is First In First Out (FIFO)”. Study first in first out (fifo) explanation with operating system terms to review operating system course for online degree programs.

First In First Out (FIFO) Definition:

  • A queuing technique in which the next item to be retrieved is the longest held item in the queue.

    Operating Systems by William Stallings



First In First Out (FIFO) Explanation:

FIFO (First In First Out) is a method for organizing and manipulating data, where the oldest entry i.e. first entry, or head of the queue is processed first. Queue is an example of FIFO, in which the element that is added first is processed first as well.

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