All Past Papers Of All Universities And Job Test

On Fri, Jul 1, 2011 at 12:55 AM, mc100200349 Naveed Yar Khan <mc100200349@vu.edu.pk> wrote:

acha to ap bewakoof ho ye ap ko kis ne bataya ke pathan bewakoof hote hy ap honge aur to nahe hote me ne to kabe nahe deki pathan are so sweet & loving people

On Thu, Jun 30, 2011 at 5:05 PM, Atif Aleem <atifalm@gmail.com> wrote:

i am bevkoof
coz i am pthan

hahahaha

On Thu, Jun 30, 2011 at 5:02 PM, aAisH <mc100405526@vu.edu.pk> wrote:

On Thu, Jun 30, 2011 at 5:01 PM, *FaRi* <ikfarigull@gmail.com> wrote:

Tumhari himat kesy hoi soboooooooooo k tum mery baray main
logon ko yeh btao k

?

?

?

?

??

?

?

i m so sweet

i m so cute

i m so nice

Agar mijy

nazar lag jati to ????

--

*Muhabbat k liey kuch khas dil mukhsoos hua kertay hain*
*Ye wo nagma hai jo har saaz par gaaya nahi jata*

I Am Proud that i am pathan

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acha ji ab koi help kr bhi day..... saray nakhray kr rahe hain.......

On Fri, Jul 1, 2011 at 1:28 AM, mc080203417 Iffat Arif <mc080203417@vu.edu.pk> wrote:

insert pictur then chart option

On Fri, Jul 1, 2011 at 12:34 AM, mc080404722 Maria Shahzadi <mc080404722@vu.edu.pk> wrote:

hi
who is there plz tell me that how to make a chart in ms-word i forgot.. plz tell me early..

On Fri, Jul 1, 2011 at 12:22 AM, Mohammad Sajjad <ghulamemastan@gmail.com> wrote:

dekha mera nam hi kafi hai ab samajh i k samjhaon?

On 6/30/11, mc090202888 Saba Naureen <mc090202888@vu.edu.pk> wrote:
> hmmmmmmmmm samajh aa gai pehle sawal ki.......
> how intelligent i am .........
>
> On Thu, Jun 30, 2011 at 11:39 PM, mc090202888 Saba Naureen <
> mc090202888@vu.edu.pk> wrote:
>
>> A computer system has a 36-bit virtual address space with a page size of
>> 8K, and 4 bytes per page table entry.
>>
>> 1. How many pages are in the virtual address space?
>> 2. What is the maximum size of addressable physical memory in this
>> system?
>> 3. If the average process size is 8GB, would you use a one-level,
>> two-level, or three-level page table? Why?
>> 4. Compute the average size of a page table in question 3 above.
>>
>> Solution:
>>
>> 1. A 36 bit address can address 2^36 bytes in a byte addressable
>> machine. Since the size of a page 8K bytes (2^13), the number of
>> addressable
>> pages is 2^36 / >2^13 = 2^23
>> 2. With 4 byte entries in the page table we can reference 2^32 pages.
>> Since each page is 2^13 B long, the maximum addressable physical memory
>> size
>> is 2^32 * 2^13 = 2^45 B (assuming no protection bits are used).
>> 3. 8 GB = 2^33 B
>>
>> We need to analyze memory and time requirements of paging schemes in order
>> to make a decision. Average process size is considered in the calculations
>> below.
>>
>> *1 Level Paging*
>> Since we have 2^23 pages in each virtual address space, and we use 4 bytes
>> per page table entry, the size of the page table will be 2^23 * 2^2 =
>> 2^25.
>> This is 1/256 of the process' own memory space, so it is quite costly. (32
>> MB)
>>
>> *2 Level Paging*
>> The address would be divided up as 12 | 11 | 13 since we want page table
>> pages to fit into one page and we also want to divide the bits roughly
>> equally.
>>

>> Since the process' size is 8GB = 2^33 B, I assume what this means is that
>> the total size of all the distinct pages that the process accesses is 2^33
>> B. Hence, this process accesses 2^33 / 2^13 = 2^20 pages. The bottom level
>> of the page table then holds 2^20 references. We know the size of each
>> bottom level chunk of the page table is 2^11 entries. So we need 2^20 /
>> 2^11
>> = 2^9 of those bottom level chunks.
>>
>> The total size of the page table is then:
>>
>> //size of the outer page table
>>
>> //total size of the inner pages
>>
>> 1 * 2^12 * 4
>>
>> + 2^9 * 2^11 * 4
>>
>> = 2^20 * ( 2^-6 + 4) ~4MB
>>
>> *3 Level Paging*
>> For 3 level paging we can divide up the address as follows:
>> 8 | 8 | 7 | 13
>>
>> Again using the same reasoning as above we need 2^20/2^7 = 2^13 level 3
>> page table chunks. Each level 2 page table chunk references 2^8 level 3
>> page
>> table chunks. So we need 2^13/2^8 = 2^5 level-2 tables. And, of course,
>> one
>> level-1 table.
>>
>> The total size of the page table is then:
>>
>> //size of the outer page table
>>
>> //total size of the level 2 tables
>>
>> //total size of innermost tables
>>
>> 1 * 2^8 * 4
>>
>> 2^5 * 2^8 *4
>>
>> 2^13 * 2^7 * 4
>>
>> ~4MB
>>
>> As easily seen, 2-level and 3-level paging require much less space then
>> level 1 paging scheme. And since our address space is not large enough,
>> 3-level paging does not perform any better than 2 level paging. Due to the
>> cost of memory accesses, choosing a 2 level paging scheme for this process
>> is much more logical.
>>

>> 1. Calculations are done in answer no. 3
>>
>>
>>
>>
>> On Thu, Jun 30, 2011 at 11:37 PM, mc090202888 Saba Naureen <

>> mc090202888@vu.edu.pk> wrote:
>>

>>> A computer system has a 32-bit virtual address space with a page size of
>>> 4K and 8

>>> bytes per page table entry.

>>> 1. How many pages can be in the virtual address space?

>>> 2. What is the maximum size of addressable physical memory in this
>>> system?
>>>

>>> is question ki exact ulat example mili hai..... net se
>>>
>>>
>>> On Thu, Jun 30, 2011 at 11:33 PM, Mohammad Sajjad <
>>> ghulamemastan@gmail.com> wrote:
>>>
>>>> knsa hai swal ji?
>>>>
>>>> On 6/30/11, mc090202888 Saba Naureen <mc090202888@vu.edu.pk> wrote:
>>>> > bhaiya assignment ke sawal hi nahi hal ho rahe..... kiya karan......
>>>> >
>>>> > On Thu, Jun 30, 2011 at 11:28 PM, Mohammad Sajjad
>>>> > <ghulamemastan@gmail.com>wrote:
>>>> >
>>>> >> yes what help u need?
>>>> >>
>>>> >> On 6/30/11, mc090202888 Saba Naureen <mc090202888@vu.edu.pk> wrote:
>>>> >> > yar kisi ne is stupid assignment ko try kiya hai????
>>>> >> >
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>>>> >>
>>>> >>
>>>> >> --
>>>> >> ~Ghulam-e-Mastan~
>>>> >> الله محمد چار یار حاجی خواجہ قطب فرید
>>>> >> ( حق فرید یا فرید ( رحمتہ الله علیہ
>>>> >>
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>>>> >>
>>>> >>
>>>> >
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>>>>
>>>> --
>>>> ~Ghulam-e-Mastan~
>>>> الله محمد چار یار حاجی خواجہ قطب فرید
>>>> ( حق فرید یا فرید ( رحمتہ الله علیہ
>>>>
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>>>>
>>>>
>>>
>>
>
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~Ghulam-e-Mastan~
الله محمد چار یار حاجی خواجہ قطب فرید
( حق فرید یا فرید ( رحمتہ الله علیہ

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