What effect would updating a few byte on the one page, Operating System

Assignment Help:

Q. What is the effect of permitting two entries in a page table to point to the same page frame in memory? Describe how this effect could be used to decrease the amount of time needed to copy a large amount of memory from one place to another. What effect would updating a few byte on the one page have on the other page?

Answer: By permitting two entries in a page table to point to the same page frame in memory users can share code and data. If the code is re-entrant a lot memory space can be saved through the shared use of large programs such as text editors and compilers and database systems. Copying large amounts of memory could be consequence by having different page tables point to the same memory location.

Nevertheless sharing of non-re-entrant code or data means that any user having access to the code can modify it and these modifications would be reflected in the other user's copy.


Related Discussions:- What effect would updating a few byte on the one page

Permanently starves cpu-bound programs, Q. Presume that a scheduling algori...

Q. Presume that a scheduling algorithm at the level of short-term CPU scheduling favours those processes that have used the least processor time in the recent past. Why this algori

Can dhcp provide support for mobile users, Question: a) The Dynamic Ho...

Question: a) The Dynamic Host Control Protocol (DHCP) server is important for setting TCP/IP configuration, when there are a large number of clients on the network. How does D

Write xeyes on command line, Ask question #Minimum 100 words accepteWrite a...

Ask question #Minimum 100 words accepteWrite an xeyes command to display a window that is: ? SIZE: ¦ 400 pixels wide ¦ 300 pixels tall ? LOCATION: ¦ 100 pixels from the right edge

What advantages are there to this two-level directory, What advantages are ...

What advantages are there to this two-level directory? Users are isolated from each other. Users have more freedom in choosing file names.

Question 3:, Question 3: (a) Fincorp Ltd is an insurance company wishing t...

Question 3: (a) Fincorp Ltd is an insurance company wishing to change over to a better business system using an improved version of a financial information system (FIS). The direc

PSEUDO CODE FOR PROGRAM, THE PROGRAM WILL CHOOSE TWO RANDOM NUMBERS,THEN PR...

THE PROGRAM WILL CHOOSE TWO RANDOM NUMBERS,THEN PRINT THEM OUT AS AN ADDITION PROBLEM.THE PROGRAM WILL THEN ASK THE USERTO ENTER THE CORRECT ANSWER.IF THE ANSWER IS CORRECT,THE PRO

Define system call, Define System Call A system call is a request that ...

Define System Call A system call is a request that is made by any program to the operating system for carrying out tasks - picked from a predefined set - which the said program

What is segmentation?, What is segmentation? In a segmented memory mana...

What is segmentation? In a segmented memory management scheme a programmer views a program to be collection of program components called as segments. Every segment is a logical

10 marks, Differentiate between sequential access and direct access method?...

Differentiate between sequential access and direct access method?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd