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6 October, 20:01

Explain the difference between internal fragmentation and external fragmentation. Which one occurs in paging systems? Which one occurs in systems using pure seg - mentation?

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  1. 6 October, 20:30
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    Internal fragmentation occurs when the last allocation unit is not full. External fragmentation occurs when space is wasted between two allocation units. In a paging system, the wasted space in the last page is lost to internal fragmentation.

    In a paging system where fixed size of pages are allocated to the program and last partition of the program may not require entire page.

    In a pure segmentation system where memory is not contiguously allocated in fixed partition leading to unused memory blocks.
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