多选题

What are the differenc...

Question

What are the differences between paging and segmentation ?（多选）

A. A page and segmentation are visible to the user's program

B. A page is a physical unit of information,and the segment is a logical unit of information.

C. The page size is determined by the machine architecture, the segment size is determined by the user.

D. A segment is of fixed size, a page is of varying size.