What are the goals behind the address translation ? Which of the address translation schemes help to...

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What are the goals behind the address translation ? Which of the address translation schemes help to achieve that goal and how?What are the page replacement schema and how it solves cache hit / miss?

Neha · Accepted Answer

What are the goals behind the address translation? Which of the address translation schemes help to achieve that goal and how? 
Address translation provides multiple goals to the user. the following goals can be achieved by using the address translation.
1) Memory protection - It is important to provide a limit for the access of any process to specific region of the memory. 
2) memory sharing - the memory sharing is used when we want to provide multiple processes to a shared selected region present in the memory. 
3) Flexible memory replacement - we can use the flexible memory replacement method when we want to have the operating system a flexibility to make sure that all the processes and parts of the processes are placed somewhere in the physical memory. 
4) Sparse addresses - the address translation allows us to allocate multiple dynamic memory regions for belly programs which can be changed. The new processes have 64 bit address space but this makes the address translation More complex.

What are the goals behind the address translation ? Which of the address translation schemes help to achieve that goal and how? What are the page replacement schema and how it solves cache hit / miss?

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