Memory Management

Question 1

What are the similarities of paging and segmentation?

Answer 1

• Both allow programs to run despite insufficient memory
• Both pages and segments are stored on disk
• Both pages and segments are transferred into memory when needed

Question 2

What are the differences of paging and segmentation?

Answer 2

Paging
•	Pages are fixed size
•	Pages are made to fit sections of memory
•	Pages are physical divisions
Segmentation
•	Segments are different sizes
•	Segments are complete sections of programs
•	Segments are logical divisions

Question 3

What is the problem with paging and segmentation?

Answer 3

If physical memory is running low, virtual memory as to be used if more time is spent moving pages/segments in and out of the memory to the disk (Thrashing) than actually processing the instructions, the computer will be very slow.