Operating-system-os-memory-allocation-qa1

OSメモリ割り当てに関するQ＆A＃1

• 質問：*ページングとセグメンテーションの違いは何ですか？

• 回答：*以下は、ページングとセグメンテーションの違いです。

Sr. No.	Paging	Segmentation
1	A page is a physical unit of information.	A segment is a logical unit of information.
2	A page is invisible to the user’s program.	A segment is visible to the user’s program.
3	A page is of fixed size e.g. 4Kbytes.	A segment is of varying size.
4	The page size is determined by the machine architecture.	A segment size is determined by the user.
5	Fragmentation may occur.	Segmentation eliminates fragmentation.
6	Page frames on main memory are required.	No frames are required.