Multiple choice general knowledge science & technology

The O in FIFO/LIFO

  1. Order

  2. Out

  3. Operate

  4. Opening

  5. Obvious

  6. O - No Meaning
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In data structures and inventory management, FIFO means "First In First Out" and LIFO means "Last In First Out." The O in both acronyms stands for "Out," indicating the order in which items are removed or processed.

AI explanation

In FIFO (First In, First Out) and LIFO (Last In, First Out), the O stands for Out. These acronyms describe the order in which items leave a queue or stack relative to when they entered: FIFO removes the earliest-added item first, while LIFO removes the most recently added item first. Order is a tempting distractor because both terms relate to sequencing, but the letters actually spell out 'In' and 'Out', not 'Order'.

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