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Recent questions tagged memory-management
0
votes
1
answer
301
Operating System
Whenever Questions like:- (Example is shown below) is given and asked that say what is the turnaround time for $6k$ Process then we will always assume memory to have fixed length partition right??? cuz they have given different partition sizes in $KB$ ...
Whenever Questions like:- (Example is shown below) is given and asked that say what is the turnaround time for $6k$ Process then we will always assume memory to have fixe...
Na462
355
views
Na462
asked
Mar 21, 2018
Operating System
operating-system
memory-management
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0
votes
0
answers
302
malloc
queue->array = (int*) malloc(queue->capacity *sizeof(int)); What is queue->capacity * doing here?
queue->array = (int*) malloc(queue->capacity *sizeof(int));What is queue->capacity * doing here?
Ahsanul Hoque
297
views
Ahsanul Hoque
asked
Mar 16, 2018
Programming in C
programming-in-c
memory-management
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0
votes
1
answer
303
Memory managment
Difference between static memory allocation and dynamic memory allocation.(Need concept clearing explanation)
Difference between static memory allocation and dynamic memory allocation.(Need concept clearing explanation)
Ahsanul Hoque
538
views
Ahsanul Hoque
asked
Feb 28, 2018
Programming in C
memory
memory-management
programming-in-c
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1
votes
1
answer
304
Operating Systems #Page-table-size
Main-Memory Size=64MB, Logical address-32bits long, Page size-4KB, What is the total space wasted in maintaining the page table? Soln- 220(No. of pages) * 2B(14bits~2B)(frame-address-bits) = 2MB In this question why we consider the ... page table entries? I don't know why such confusions come in such a crucial time! Please answer and clear my confusion asap!
Main-Memory Size=64MB, Logical address-32bits long, Page size-4KB,What is the total space wasted in maintaining the page table? Soln- 220(No. of pages) * 2B(14bits~2B)(f...
Ashish Goyal 3
2.3k
views
Ashish Goyal 3
asked
Jan 26, 2018
Operating System
paging
memory-management
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1
votes
1
answer
305
Memory Management
This question was asked in one of the assignments: http://www.cs.utexas.edu/~lorenzo/corsi/cs372/06F/hw/3sol.html But I'm not clear with the explanation. Can someone please explain how to solve this?
This question was asked in one of the assignments: http://www.cs.utexas.edu/~lorenzo/corsi/cs372/06F/hw/3sol.html But I'm not clear with the explanation. Can someone plea...
Akundi Prathyusha
561
views
Akundi Prathyusha
asked
Jan 23, 2018
Operating System
memory-management
paging
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2
votes
1
answer
306
book volume-2 ACE ,memory management
Consider a logical address space of eight pages of 1,024 words each, mapped on to a physical memory of 32 frames. a)How many bits are in logical address? b)How many bits are in physical address?
Consider a logical address space of eight pages of 1,024 words each, mapped on to a physical memory of 32 frames.a)How many bits are in logical address?b)How many bits ar...
meethunjadhav
677
views
meethunjadhav
asked
Jan 14, 2018
Operating System
operating-system
memory-management
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4
votes
0
answers
307
Ace Test Series: Operating System - Memory Management
The purpose of applying paging in segmentation is A.) To overcome thrashing B.) To overcome external fragmentation C.) To reduce segment table size overhead D.) Both B & C my answer is B given answer is D i want to ask how the size overhead is decreased as compared to pure segmentation.
The purpose of applying paging in segmentation isA.) To overcome thrashingB.) To overcome external fragmentationC.) To reduce segment table size overheadD.) Both B & C my...
ashish pal
629
views
ashish pal
asked
Jan 14, 2018
Operating System
ace-test-series
operating-system
segmentation
memory-management
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2
votes
0
answers
308
Operating system
Please explain in detail
Please explain in detail
Harikesh Kumar
478
views
Harikesh Kumar
asked
Jan 13, 2018
Operating System
operating-system
memory-management
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1
votes
1
answer
309
virtual address size
pranab ray
610
views
pranab ray
asked
Jan 13, 2018
Operating System
operating-system
memory-management
paging
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2
votes
1
answer
310
Memory allocation Doubt
Consider the requests from processes in given order $300K$, $25K$, $125K$ and $50K$. Let there be two blocks of memory available of size $150K$ followed by a block size $350K$. Which of the following partition allocation schemes can satisfy above ... a process of $200KB$ then a process with size $100KB$ can't be allocated to this partition. Which approach is correct?
Consider the requests from processes in given order $300K$, $25K$, $125K$ and $50K$. Let there be two blocks of memory available of size $150K$ followed by a block size $...
atul_21
7.3k
views
atul_21
asked
Jan 10, 2018
Operating System
operating-system
memory-management
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2
votes
2
answers
311
Memory Management
Please Explain.
Please Explain.
Shubham Kumar Gupta
834
views
Shubham Kumar Gupta
asked
Jan 8, 2018
Operating System
operating-system
memory-management
paging
virtual-memory
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2
votes
1
answer
312
Segmented Pagging
Consider a system using segmented paging architecture. The segment is divided into 1K pages and each page is having 512entries. The segment number requires 13 bits to represent all the segments of LAS, and the frame number requires 18 bit to represent all the frame of PAS ... page table entry is 4 Word. Then what is the size of each page table? What is the size of all page tables?
Consider a system using segmented paging architecture. The segment is divided into 1K pages and each page is having 512entries. The segment number requires 13 bits to rep...
Shubhanshu
2.1k
views
Shubhanshu
asked
Jan 8, 2018
Operating System
segmentation
operating-system
memory-management
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2
votes
2
answers
313
Paging- Memory Management
A system support 32 bit virtual address with a page size of power of 2. Page table entries 32 bit wide. The page size in KB of the system should be ____ in order to make sure that the page table fits exactly in one frame of memory.
A system support 32 bit virtual address with a page size of power of 2. Page table entries 32 bit wide. The page size in KB of the system should be ____ in order to make ...
amIndian
875
views
amIndian
asked
Dec 30, 2017
Operating System
operating-system
paging
memory-management
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1
votes
0
answers
314
paging
Consider a system with 2 level paging applicable the page table is divided into 8K pages each of size 16 KB. The memory is byte addressable if the physical address space is 128 MB which is divided into 4KB frames. The page table entry size of outer page table is 32 bits and page table entry size ... and outer page table. a) 32 KB, 128 KB b) 32 KB, 32 KB c) 128 KB, 128 KB d) 128 KB, 32 KB
Consider a system with 2 level paging applicable the page table is divided into 8K pages each of size 16 KB. The memory is byte addressable if the physical address space ...
Abhishek Kumar Singh
435
views
Abhishek Kumar Singh
asked
Dec 29, 2017
Operating System
operating-system
paging
memory-management
multilevel-paging
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0
votes
2
answers
315
Operating System Paging ISI
A 32-bit machine has a page/frame size of 1 KB. (i) What is the size of the complete first-level (primary) page table for a process? (ii) If page tables are also stored using paging, how many levels of paging will be required?
A 32-bit machine has a page/frame size of 1 KB.(i) What is the size of the complete first-level (primary) page table for a process?(ii) If page tables are also stored usi...
kauray
688
views
kauray
asked
Dec 21, 2017
Operating System
operating-system
paging
memory-management
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2
votes
0
answers
316
Operating Systems Paging
In a paging-based memory management system, the page table for a process contains the physical addresses of the pages in that process' address space. Consider a memory management system on a machine with a 32-bit address bus that uses a ... for storing additional information about a page (besides the physical address of the corresponding frame) in each page table entry?
In a paging-based memory management system, the page table for a process contains the physical addresses of the pages in that process’ address space. Consider a memory ...
kauray
462
views
kauray
asked
Dec 20, 2017
Operating System
operating-system
paging
memory-management
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–
0
votes
1
answer
317
Operating System Demand Paging
In a demand-paged system, it takes 100 nanoseconds to access memory. The page table has 8 entries and is held in registers. It takes 10 milliseconds to service a page fault if an empty frame is available or if the victim frame is not ... is dirty 80% of the time, find the maximum page fault rate for which the effective memory access time remains within 200 nanoseconds
In a demand-paged system, it takes 100 nanoseconds to access memory. The page table has 8 entries and is held in registers. It takes 10 milliseconds to service a page fau...
kauray
1.6k
views
kauray
asked
Dec 20, 2017
Operating System
operating-system
demand-paging
memory-management
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1
votes
0
answers
318
Operating system memory
There are 5 processes having an average size of 100k. Average size of hole is 60k. Percentage of memory wasted in holes? 76 37 23 None
There are 5 processes having an average size of 100k. Average size of hole is 60k. Percentage of memory wasted in holes?763723None
amIndian
1.6k
views
amIndian
asked
Dec 19, 2017
Operating System
memory-management
fragmentation
operating-system
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1
votes
1
answer
319
Memory Management
Suppose you have a computer system with a $48-bit$ logical address, page size of $16KB$ and $4 bytes$ per page table entry. If we have a $48MB$ program such that the entire program and all necessary page tables are in memory. How much memory is used by program, including its page tables?
Suppose you have a computer system with a $48-bit$ logical address, page size of $16KB$ and $4 bytes$ per page table entry. If we have a $48MB$ program such that the enti...
ankitgupta.1729
483
views
ankitgupta.1729
asked
Dec 15, 2017
Operating System
operating-system
memory-management
paging
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–
1
votes
1
answer
320
IES ESE
A disc drive has a average seek time of 10ms, 32 sectors on each track and 512 bytes per sector. If the average time to read 8kbytes of continuously stored data is 20ms, what is the rotational speed of the disc drive? 3600 rpm 6000 rpm 3000 rpm 2400 rpm
A disc drive has a average seek time of 10ms, 32 sectors on each track and 512 bytes per sector.If the average time to read 8kbytes of continuously stored data is 20ms, w...
anshgyl
2.2k
views
anshgyl
asked
Dec 8, 2017
Operating System
memory-management
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0
votes
0
answers
321
What is page size
student2018
311
views
student2018
asked
Dec 3, 2017
Operating System
paging
memory-management
co-and-architecture
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–
1
votes
1
answer
322
Address Space
I am little bit unclear about Linear,Logical and Physical Address. Can anybody tell which is accessed when and how? or any valid documentation to read plz
I am little bit unclear about Linear,Logical and Physical Address. Can anybody tell which is accessed when and how?or any valid documentation to read plz
Na462
376
views
Na462
asked
Nov 26, 2017
CO and Architecture
memory-management
address
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2
votes
2
answers
323
Suppose that cache access time is 7 ns, main memory access time is 50 ns and disk space access time is 1200 ns.
Suppose that cache access time is 7 ns, main memory access time is 50 ns and disk space access time is 1200 ns. If the hit rate of cache is 60% and of main memory hier...
Rohit Gupta 8
1.3k
views
Rohit Gupta 8
asked
Nov 18, 2017
Operating System
operating-system
memory-management
virtual-memory
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4
votes
1
answer
324
Dynamic and Static Linking
Does the dynamically linked files are slower in execution as compared to static linked files?
Does the dynamically linked files are slower in execution as compared to static linked files?
Mk Utkarsh
506
views
Mk Utkarsh
asked
Nov 16, 2017
Operating System
linker
operating-system
memory-management
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–
0
votes
0
answers
325
Doubt_in_Addressing
Though its a trivial doubt but i want to ask Here in this question : Given is 36bit virtual address means We can address every bit which of address space with 36bits now considering bytes we just need 33bits Right? Because each 8bit will be grouped Here Its mentioned that $2^{^{36}}Bytes$. So please comment on this.And correct me !
Though its a trivial doubt but i want to ask Here in this question :Given is 36bit virtual address means We can address every bit which of address space with 36bits now c...
saxena0612
460
views
saxena0612
asked
Nov 15, 2017
Operating System
memory-management
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–
1
votes
2
answers
326
operating system
Ravi prakash pandey
455
views
Ravi prakash pandey
asked
Nov 12, 2017
Operating System
memory-management
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–
1
votes
0
answers
327
Memory allocation
In an multiprogramming fixed partitioning the number of partitions are fixed or size of partitions are fixed please explain
In an multiprogramming fixed partitioning the number of partitions are fixed or size of partitions are fixed please explain
Swami patil
427
views
Swami patil
asked
Nov 10, 2017
Operating System
memory-management
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–
1
votes
1
answer
328
Memory techniques
Fixed partitioning for contiguous memory allocation suffers from external fragmentation or not please explain with example
Fixed partitioning for contiguous memory allocation suffers from external fragmentation or not please explain with example
Swami patil
406
views
Swami patil
asked
Nov 10, 2017
Operating System
memory-management
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–
0
votes
2
answers
329
Self doubt
How to understand that no. of entries in inverted page table is equal to no of frames in physical address space?
How to understand that no. of entries in inverted page table is equal to no of frames in physical address space?
Anshul Shankar
1.1k
views
Anshul Shankar
asked
Oct 28, 2017
Operating System
operating-system
memory-management
paging
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–
2
votes
1
answer
330
advantages of segmented paging over pure paging
As we know segmented paging is an improvement over segmentation and paging but I am having some doubts regarding the memory overhead of these three system.It is clear that segmentation need less memory overhead.But about other two system ... of frag mention is much more than pure paging and also extra segmentation table is required in this system?
As we know segmented paging is an improvement over segmentation and paging but I am having some doubts regarding the memory overhead of these three system.It is clear tha...
reena_kandari
1.8k
views
reena_kandari
asked
Oct 28, 2017
Operating System
operating-system
memory-management
segmentation
+
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