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Recent questions tagged virtual-memory

0 votes

1 answer

1

OS
By default the memory address starts with 0. But they have considered from 1. What should I consider when nothing is mentioned?

DAWID15 asked in Operating System Jan 22

75 views

0 votes

0 answers

2

Gate 2015
For problems where the options are not given, like this kinda questions should I consider hierarchical access or simultaneous access. I know that hierarchical access is commonly used so it should be preferred but the solution for this is described using simultaneous access.

DAWID15 asked in CO and Architecture Jan 3

77 views

2 votes

1 answer

3

No of page levels involved?
Consider a virtual memory system where, physical memory = 4GB page size = 4KB, page table entry size = 4B and 45-bit virtual address. Assume every page table exactly fits into a single page. If page table entry size is 4B then how many levels of page tables would be required.

h4kr asked in Operating System Jan 2

by h4kr

158 views

0 votes

0 answers

4

Operating System
What is the relationship between paging and virtual memory? A Virtual memory came before paging B When pages are created in disks, it is called a virtual memory? C Virtual memory can never be implemented without paging D Both have the same concepts

rayhanrjt asked in Operating System Dec 29, 2022

64 views

2 votes

1 answer

5

What is the solution?
I think the answer must be 500200ns

h4kr asked in Operating System Dec 29, 2022

by h4kr

92 views

0 votes

2 answers

6

Arihant Gate Tutor
If a processor has 32-bit virtual address, 28-bit physical address, 2 kb pages. How many bits are required for the virtual, physical page number? 17, 21 21, 17 6, 10 None The answer given is b. 21, 17

arkaprava_gupta asked in CO and Architecture Dec 23, 2022

by arkaprava_gupta

271 views

0 votes

3 answers

7

Arihant Gate Tutor
Memory mapping table is used to (a) Translate virtual address to physical address (b) Translate physical address to virtual address (c) Both (d) None

arkaprava_gupta asked in CO and Architecture Dec 23, 2022

by arkaprava_gupta

106 views

0 votes

1 answer

8

Consider the following segment table: Segment Base Length 0 220 600 1 2300 20 2 90 100 3 1320 580 4 1960 90 a. Draw a memory allocation table: b. What are the physical addresses for the following logical addresses? i. 0, 430 ii. 1, 10 iii. 3, 80 iv. 2, 500

bamcikibambam asked in Operating System Dec 21, 2022

by bamcikibambam

133 views

0 votes

1 answer

9

Self Doubt | Logical Address | Virtual Address | Virtual Memory
Can anyone explain how are these two things connected (i) Virtual Memory (part of HDD, acting as RAM) and (ii) Virtual Address Space (Logical Address, generated by CPU during compilation), and where exactly is this Logical Address stored?

Souvik33 asked in Others Dec 12, 2022

111 views

1 vote

1 answer

10

paging
Can anyone diagrammatically explain what is the difference between Page size vs Page table entry size in a page table?

Bishes asked in Operating System Dec 3, 2022

by Bishes

241 views

1 vote

2 answers

11

OS Self doubt Memory management
Suppose that a machine has 42-bit virtual addresses and 32-bit physical addresses. {a} How much RAM can the machine support (each byte of RAM must be addressable)? {b} What is the largest virtual address space that can be supported for a process? ... each second-level page table? {f} What is the advantage of using a two-level page table over single-level page table?

legacy asked in Operating System Nov 27, 2022

by legacy

172 views

2 votes

1 answer

12

With segmentation, if there are 64 segments and maximum segment size is 512 words; the length of logical address is how many bits a) 12 b) 6 c) 15 d) 9

Jeetmoni saikia asked in Operating System Oct 21, 2022

by Jeetmoni saikia

510 views

1 vote

1 answer

13

Institute of Technology, GNCTD
If the average page-fault service time of 20 𝑚s, a 𝑀AT of 80 𝑛s and the probability of a page fault is 10 %. An effective access time will be: 2,000,672 𝑛s 2,000,072 𝑛s 2,000,036 𝑛s 2,000,006 𝑛s

rsansiya111 asked in Operating System Feb 25, 2022

172 views

1 vote

1 answer

14

Memory Management
In a virtual memory system, size of the virtual address is 32-bit, size of the physical address is 30-bit, page size is 4 KByte and size of each page table entry is 32-bit. The main memory is word addressable and word size is 4Bytes. Find the maximum number of bits that can be used for storing other information ?

Vidya Sagar asked in Operating System Jan 3, 2022

279 views

1 vote

1 answer

15

Applied Gate All India Mock Test 3 - 2022
Suppose we have virtual memory containing 8 pages with 512 bytes per page and physical memory with 16-page frames. Given the following page table ( where virtual page number gives page number and page frame number gives frame number ), the physical address( in decimal ) corresponding to the virtual address of page number 4, byte 241 is ______ .

Aadesh asked in Operating System Dec 19, 2021

by Aadesh

666 views

0 votes

0 answers

16

https://www.cs.utexas.edu/~lorenzo/corsi/cs372/06F/hw/3sol.html
https://www.cs.utexas.edu/~lorenzo/corsi/cs372/06F/hw/3sol.html Here, in problem 2: In solution, point number 2 should be: With 4-byte entries in the page table we can reference 2^34 pages. Since each page is 2^13 B long, the ... B (assuming no protection bits are used). REASON: 2^36/ 2^2 = 2^34, please correct me if I am wrong.

ankit3009 asked in Operating System Dec 10, 2021

260 views

2 votes

2 answers

17

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

891 views

1 vote

0 answers

18

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

397 views

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Recent questions tagged virtual-memory