Question

what are disadvantage of non-contiguous memory allocation?

Answer 1

The non-contiguous memory allocation includes segmentation and paging hence it affects the overall hardware cost.

 When it comes to main memory, it will limit the segmentation size, which is, segmentation is completely bound by a size limit of memory.

This process is difficult for managing the segments on even secondary storage. Segmentation is the process which is very slower when compared with paging.