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Recent questions tagged paging

9 votes
5 answers
271
ISRO2016-22
Let the page fault service time be $10$ ms in a computer with average memory access time being $20$ ns. If one page fault is generated for every $10^6$ memory accesses, what is the effective access time for the memory? 21.4 ns 29.9 ns 23.5 ns 35.1 ns
Let the page fault service time be $10$ ms in a computer with average memory access time being $20$ ns. If one page fault is generated for every $10^6$ memory accesses, w...
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4 votes
4 answers
272
ISRO2014-70
Dirty bit is used to indicate which of the following? A page fault has occurred A page has corrupted data A page has been modified after being loaded into cache An illegal access of page
Dirty bit is used to indicate which of the following?A page fault has occurredA page has corrupted dataA page has been modified after being loaded into cacheAn illegal ac...
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0 votes
0 answers
274
page size vs frame size
What is the page size taken if page size is less than frame size? Take an example page size =4kb and frame size = 8kb , Then for calculating virtual address space , which page size value do we take?
What is the page size taken if page size is less than frame size?Take an example page size =4kb and frame size = 8kb ,Then for calculating virtual address space , which p...
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6 votes
5 answers
275
ISRO2014-77
What is the size of the physical address space in a paging system which has a page table containing 64 entries of 11 bit each (including valid and invalid bit) and a page size of 512 bytes? $2^{11}$ $2^{15}$ $2^{19}$ $2^{20}$
What is the size of the physical address space in a paging system which has a page table containing 64 entries of 11 bit each (including valid and invalid bit) and a page...
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3 votes
3 answers
276
TANENBAUM - Memory Management - Paging
A computer has 32-bit virtual addresses and 4-KB pages. The program and data together fit in the lowest page (0-4095). The stack fits in the highest page. How many page table entries are needed for two-level paging, with 10 bits in each part?
A computer has 32-bit virtual addresses and 4-KB pages. The program and data together fit in the lowest page (0-4095). The stack fits in the highest page. How many page ...
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2 votes
0 answers
277
Can a page fault be generated due to the absence of the page of inner page table , table for multi level paging ?
Consider, 2 level paging , with Process P, Inner page table PTi, and outer page table PTo.Now we know that P and PTi are divided in various pages but PTo is in 1 page on...
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7 votes
2 answers
278
ISRO2007-25
What is the name of the technique in which the operating system of a computer executes several programs concurrently by switching back and forth between them? Partitioning Multi-tasking Windowing Paging
What is the name of the technique in which the operating system of a computer executes several programs concurrently by switching back and forth between them?Partitioning...
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8 votes
4 answers
279
ISRO2011-24
If the page size in a 32-bit machine is 4K bytes then the size of page table is 1 M bytes 2 M bytes 4 M bytes 4 K bytes
If the page size in a 32-bit machine is 4K bytes then the size of page table is1 M bytes2 M bytes4 M bytes4 K bytes
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0 votes
1 answer
280
page offset
how to calculate offset of page
how to calculate offset of page
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6 votes
2 answers
282
ISRO-2013-56
In a $64$- bit machine, with $2$ GB RAM, and $8$ KB page size, how many entries will be there in the page table if its is inverted? $2^{18}$ $2^{20}$ $2^{33}$ $2^{51}$
In a $64$- bit machine, with $2$ GB RAM, and $8$ KB page size, how many entries will be there in the page table if its is inverted?$2^{18}$$2^{20}$$2^{33}$$2^{51}$
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0 votes
1 answer
283
link for page table concept
Till now i have not got any exciting and detailed explanation of page tables and multi level page tables concept. if you have any resource on this please post the link ..
Till now i have not got any exciting and detailed explanation of page tables and multi level page tables concept. if you have any resource on this please post the link .....
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2 votes
2 answers
284
Bits required to store logical address
suppose a paging system has 2^g+h virtual addresses & uses 2^h+k locations in primary memory for integers g,h & k. what is the page size of the system that is implied by the virtual & physical address sizes? how many bits are required to store a virtual address
suppose a paging system has 2^g+h virtual addresses & uses 2^h+k locations in primary memory for integers g,h & k. what is the page size of the system that is implied by ...
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1 votes
1 answer
285
How to calculate Physical Address corresponding to Logical Address
Represent the sentence "We are IT students" in physical memory if page size is 5 characters and the entries in page table are- 0 6 1 5 2 7 3 10 Assume physical memory size to be 55 characters
Represent the sentence "We are IT students" in physical memory if page size is 5 characters and the entries in page table are-061527310Assume physical memory size to be 5...
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2 votes
1 answer
286
Calculating size of page table
Given answer: A. Please explain
Given answer: A. Please explain
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0 votes
1 answer
287
Number of memory access
Given answer is A. I believe that B should be the answer because as the number of page tables are k. k memory access are required for each table and finally, one for accessing the data from main memory. Please check.
Given answer is A.I believe that B should be the answer because as the number of page tables are k. k memory access are required for each table and finally, one for acces...
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1 votes
1 answer
289
page table
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0 votes
1 answer
293
Operating System
The question I answered was 4096 bytes and what the test answered is in KB and both the answers are correct . But in GATE how do we come to know whether the answer should be given in bytes or Kb or MB or GB?
The question I answered was 4096 bytes and what the test answered is in KB and both the answers are correct . But in GATE how do we come to know whether the answer should...
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2 votes
2 answers
294
Inverted Page Table
Consider a machine with 64 MB physical memory and 34 bit virtual address space.If the page size is 4 KB ,the approximate size of conventional and inverted page table will be??
Consider a machine with 64 MB physical memory and 34 bit virtual address space.If the page size is 4 KB ,the approximate size of conventional and inverted page table will...
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4 votes
1 answer
295
which is accessed frist TLB or cache?
I have a doubt which is accessed first TLB or cache? I think answer should be TLB as we need it for address translation to get frame no. and then access cache Is my approach right?
I have a doubt which is accessed first TLB or cache?I think answer should be TLB as we need it for address translation to get frame no. and then access cacheIs my approac...
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1 votes
0 answers
296
size of the page table
If the no of pages in a 32 bit machine is 8kB then what is the size of the page table? a. 8kb b. 16kB c. 4 KB d. Cant say Ans: a How is the answer a
If the no of pages in a 32 bit machine is 8kB then what is the size of the page table?a. 8kbb. 16kBc. 4 KBd. Cant sayAns: a How is the answer a
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5 votes
7 answers
297
ISRO2008-52
Dynamic address translation is part of the operating system paging algorithm is useless when swapping is used is the hardware necessary to implement paging storage pages at a specific location on disk
Dynamic address translationis part of the operating system paging algorithmis useless when swapping is usedis the hardware necessary to implement pagingstorage pages at a...
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3 votes
2 answers
298
ISRO2008-53
Thrashing always occurs on large computers is a natural consequence of virtual memory systems can always be avoided by swapping can be caused by poor paging algorithms
Thrashingalways occurs on large computersis a natural consequence of virtual memory systemscan always be avoided by swappingcan be caused by poor paging algorithms
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34 votes
3 answers
299
GATE CSE 1997 | Question: 3.10, ISRO2008-57, ISRO2015-64
Dirty bit for a page in a page table helps avoid unnecessary writes on a paging device helps maintain LRU information allows only read on a page None of the above
Dirty bit for a page in a page tablehelps avoid unnecessary writes on a paging devicehelps maintain LRU informationallows only read on a pageNone of the above
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