@manish
Q1. Paging has various advantages.
1. Increase the process address space to 4 GB (assuming 32 bit address
and data bus) even if physical memory is less than 4 GB.
2. Provides Security through Virtual Memory. Each process has its own
physical address space and cannot interfere with other process.
It is upto the designer to choose whether to use paging or not.
Suppose you are designing an embedded system(like traffic indicator) you
can go without paging.
For a mobile operating system , it is always better to have paging since
number of applications can vary at run time during the lifetime of the
phone.
Q2. Can you explain the qn bit more.
Thanks and Regards,
Prabagaran.
Thanks and Regards,
Prabagaran.
On Mon, Nov 5, 2012 at 7:14 AM, Hanlei Qin <[email protected]> wrote:
> I think the answer to Q1 may "Yes".
> Cause the virtual memory of program is limited, they need logically
> contiguous memory, and have limit from OS and processor(32-bit, or
> 64-bit) yet.
> I have no idea about Q2.
>
>
> On Mon, Nov 5, 2012 at 4:30 AM, manish <[email protected]> wrote:
> > Q1. If we have infinite memory, then do we still be needing paging?
> > Q2. Given only 8bits registers, you have to find average of 4 bit
> registers
> > values without using any operation involving 16 bit calculations.
> >
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