distinguish between paging and swapping?
Answer / gowrav goyal
Swapping:
Whole process is moved from the swap device to the main
memory for execution. Process size must be less than or
equal to the available main memory. It is easier to
implementation and overhead to the system. Swapping systems
does not handle the memory more flexibly as compared to the
paging systems
Paging:
Only the required memory pages are moved to main memory
from the swap device for execution. Process size does not
matter. Gives the concept of the virtual memory.
It provides greater flexibility in mapping the virtual
address space into the physical memory of the machine.
Allows more number of processes to fit in the main memory
simultaneously. Allows the greater process size than the
available physical memory. Demand paging systems handle the
memory more flexibly.
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distinguish between paging and swapping?
Sorry to all Technical person for mistake of Question. Now i am post currect question Why copied file permission is changed in destination. When i give all permission i.e 777 to file and copy that to other location in destination the permission is 755. But if give permission 555 in destination that file permission is 555 and if give permission 444 to file after copy in destination the file permission is 444. These all are happening in normal user. How the umask value is calculate here really i am not understand. Please write the proper answer. Thanks in Advance
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