Question

Question # 5 In a swapping/relocation system, the values assigned to the <base, limit register pair prevent one user process from writing into the address space of another user process. However, these assignment operations are themselves privileged instructions that can only be executed in kernel mode. Is it conceivable that some operating-system processes might have the entire main memory as their address space? If this is possible, is it necessarily a bad thing? Explain.

Answer 1

No, This is not possible. A operating system processes not have the entire main memory as their address space because There is no single process can occupy every address beacause the kernel must have to remain in the memory all time and including the virtual memory. and as we know that all the unused physical memory will allocate to virtual memory. so, the process are allocate address in the virtual address space itself and by the allocation of these address there are some of the address which are already kept for system use only. So, the conclusion is no such process can entirely use the address space.