Question

1. Consider the paged and segmented memory allocation schemes described in this chapter. Explain in detail at least three advantages and disadvantages of each.

Answer 1

list of advantages and disadvantages of paging
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Paging reduces external fragmentation, but still suffer from internal fragmentation.
Paging is simple to implement and assumed as an efficient memory management technique.
Due to equal size of the pages and frames, swapping becomes very easy.
Page table requires extra memory space, so may not be good for a system having small RAM.

Advantages of Segmentation
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No Internal fragmentation.
Segment Table consumes less space in comparison to Page table in paging.

Disadvantage of Segmentation
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As processes are loaded and removed from the memory, the free memory space is broken into little pieces, causing External fragmentation.