Recent questions tagged memory-management

Recent questions tagged memory-management

0 votes

0 answers

1

What is the empty 4 bytes below the "valid" variable?
int main(int argc, char *argv[]) { int valid = 0; char str1[8] = "start"; char str2[8]; gets(str2); if (strncmp(str1, str2, 8) == 0) valid = 1; printf("buffer1: str1(%s), str2(%s), valid(%d)\n", str1, str2, valid); }

Tejeshwara asked in Programming Jun 12

110 views

0 votes

0 answers

2

Madeeasy question
In a buddy system of memory management successive request of 50k,25k,35k are satisfied with 256 of available memory how many block are (with sizes )are left? 1)two blocks(32k, 64k) 2)one block(94) 3)one block (145) 4) many block varying the sizes

Vaishnavi Gadhe asked in Operating System Apr 10

by Vaishnavi Gadhe

7 views

3 votes

2 answers

3

GATE CSE 2022 | Question: 28
Which one of the following statements is $\text{FALSE}?$ The $\text{TLB}$ performs an associative search in parallel on all its valid entries using page number of incoming virtual address. If the virtual address of a word given by $\text{CPU}$ has a ... $\text{V2}$ map to the same value while hashing, then the memory access time of these addresses will not be the same.

Arjun asked in Operating System Feb 15

by Arjun

1.0k views

0 votes

1 answer

4

Gate Applied Test Series
Question: Consider a system using a segmented paging architecture. The segment is divided into 8k pages each of size 2k words . The segment table is divided into 256 k pages each of size 512 words. The page table entry size requires 64 bits . The frame number requires 22 bits ... address (LA). Note: 1 Word = 1 Byte Options Are: A. 51 bits B. 61 bits C. 33 bits D. 64 bits

lalitver10 asked in Operating System Jan 11

264 views

1 vote

2 answers

5

Gate Applied course Test series
What is answer for this question and also please explain the approach

Dheeraj Varma asked in Operating System Nov 16, 2021

by Dheeraj Varma

634 views

4 votes

1 answer

6

Applied Test Series
Please help me in understanding this question

LRU asked in Operating System Nov 7, 2021

by LRU

300 views

0 votes

1 answer

7

Applied Test Series
An operating system implements a single level paging. This system uses Translation Lookaside Buffer (TLB) and Physical Address Cache (PAC) as well. TLB has a hit ratio 90%. PAC has a miss ratio of 20%. Main memory access time, TLB access time and ... ns respectively. Assuming that all the pages of the process are in main memory, the effective memory access time is ______ (ns).

LRU asked in Operating System Nov 3, 2021

by LRU

279 views

1 vote

0 answers

8

Page Table Entries in page Table
In Page Table,page-frame address entries are static or Dynamic means whether they are changed or not??(Consider 1-level page table)

lalitver10 asked in Operating System Oct 21, 2021

258 views

1 vote

1 answer

9

Applied Practice test
Suppose: TLB lookup time = 20 ns TLB hit ratio = 80% Memory access time = 75 ns PFST = 500,000 ns 50% of the pages are dirty OS uses a single level page table What is the approximated effective access time (EAT) if we assume the page fault rate is 10%? Assume the cost to update the TLB, the page table, and the frame table (if needed) is negligible.

darshak_devani asked in Operating System Oct 18, 2021

by darshak_devani

322 views

2 votes

0 answers

10

Applied Test Series
A hypothetical system OSXZ_09 implements paging. Given LAS = 4 GB, PAS = 64 MB, Page size = 4 KB. A protection bit and a reference bit is also present in a page table entry. Then the size of the innermost page table is ____ B. Note : The memory is byte addressable.

LRU asked in Operating System Oct 11, 2021

by LRU

198 views

19 votes

4 answers

11

GATE CSE 2021 Set 2 | Question: 48
Consider a three-level page table to translate a $39-$bit virtual address to a physical address as shown below: The page size is $\text{4 KB} \;(1\text{KB}=2^{10}$ bytes$)$ and page table entry size at every level is $8$ bytes. A ... $P$ across all levels is _________ $\text{KB}$.

Arjun asked in Operating System Feb 18, 2021

by Arjun

11.2k views

Page:

1
2
3
4
5
6
...
14
next »

Follow @gateoverflow

Recent questions tagged memory-management

Search GATE Overflow for GATE CSE