Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Using pages makes it easier to manage the whole memory, avoiding excessive fragmentation and waste. As an analogy, think of Tetris, but with only square blocks: it is relatively easy to avoid fragmentation in this case. Both the virtual and the physical memory are divided into pages. As an aside, we often refer to physical memory pages as frames. Every virtual page consists of a range of virtual addresses. Virtual pages are then mapped to physical pages in the physical memory. When an application needs to access a virtual page, the corresponding virtual address is translated into a "real" physical address, and then the actual data might be read and/or written. As a consequence, note that although arrays are contiguous in virtual memory, they may be non-contiguous in physical memory. Note also that some virtual pages do not map to any actual physical memory address, because not all virtual pages are necessarily being used at any given time. The unused virtual pages are called invalid. If a program ever tries to access an invalid page, it pagefaults.
A typical virtual memory layout includes a stack, a mmap region, a heap, and the code of the program (the "text" section). Since mmap and heap grow towards each other, in the worst case they could smash into each other. The same could happen with the stack: if a program recurses for a large number of times, the stack could grow over the mmap region ("stack over?ow") and in this case something bad and usually unpredictable will happen.
Describe the differences among short-term, medium-term, and long-term scheduling. Short-term (CPU scheduler)-selects from jobs in memory those jobs that are ready to execu
when demand is 24000 units/year, production rate is 48000 units/year, setup cost is rs 200 per setup, carring cost is rs 20 per units/year, and economic batch quantity is 692.8203
Q. Presume that you have a page-reference string for a process with m frames (initially all empty). The page-reference string has length p along with n distinct page numbers
Q. How would utilize of a RAM disk affect your selection of a disk-scheduling algorithm? What factors would you require to consider? Do the similar considerations apply to hard-di
Define an assembly language Assembly language stands for a Low level programming language
What is spooling? Spooling overlaps the I/O of single job with the computation of other jobs.
DIFFERENT MULTITHREADING MODELS Multithreading Models the majority multithreading models fall into one of the following categories of threading implementation: 1. M
Q. Error detection in operating system? Error detection- Error detection take places at both the hardware and software levels. At the hardware level every data transfers must b
Produce a referenced four page report which describes the possible functionality of the system; similar systems that are out there and different possible approaches to delivering t
Managing the interaction of client and server Among the differences between traditional application programs and client server ones is that developers must create a mechanism
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd