Question:medium

'Belady’s Anomaly' refers to the phenomenon where the page fault rate increases as the number of allocated page frames increases. This is observed in which page replacement algorithm?

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To remember which algorithms are safe: Think of "Stack" algorithms. If an algorithm ranks pages by a fixed priority that doesn't change when frames are added (like time of last use or distance to next use), it is immune to Belady's Anomaly.
Updated On: Jul 4, 2026
  • Optimal (OPT)
  • Least Recently Used (LRU)
  • First-In-First-Out (FIFO)
  • Stack-based algorithms
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The Correct Option is C

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