Which file allocation method suffers most from external fragmentation and difficulty growing files?
Correct answer B. Contiguous allocation
Explanation
Contiguous allocation gives each file a run of adjacent blocks, so both sequential and direct access are fast, but free space breaks into holes and a file cannot easily grow if the next block is taken. Linked and indexed allocation let blocks be anywhere on the disk, removing external fragmentation; linked allocation is poor at direct access, and indexed allocation costs an index block.
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