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Q. Does Windows XP offer any user-mode processes that enable it to run programs developed for other operating systems? Describe two of these subsystems.
Answer: Environmental subsystems are user-mode processes layered in excess of the native executable services to enable Windows XP to run programs developed for other operating systems.
(1) A Win 32 application called the virtual DOS machine (VDM) is offer as a user-mode process to run MS-DOS applications. The VDM can perform or emulate Intel 486 instructions and also provides routines to emulate MS-DOS BIOS services and provides virtual drivers for screen and keyboard and communication ports.
(2) WOW32 (Windows-on-windows) provides kernel as well as stub routines for Windows 3.1 functions. The end routines call the appropriate Win32 subroutines converting the 16-bit addresses into 32-bit addresses.
The hardware to support demand paging is as follows Page table: This table has the skill to mark an entry invalid though a valid-invalid bit or particular value of protectio
What is the benefits OS co-operating process? Information sharing. Computation speeds up. Modularity. Convenience.
Write a brief note on demand paging. A demand paging is alike to a paging system with swapping. The Processes reside on the secondary memory while we want to implement a proces
Define swapping. A process requires being in memory to be executed. Though a process can be swapped temporarily out of memory to a backing store and then brought back into memo
Message passing system:- The function of message system is to permit processes to communicate with one another without the requirement to resort (option) to shared data. Commun
Gopher Gallery consists of a shopping mall and a cart ride that covers the 150 acre habitat. There are m visitors and n single-person vehicles. Visitors stroll around the mall at
Q. Why High level languages need Compiler? High level languages - illustrations are COBOL, FORTRAN, PL/I andALGOL - are processed by interpreters andcompilers. A compilers is a
what topic i choose for os research proposal
A working Ubuntu Linux operating system. You can use a Live-CD to complete this assignment. Create an empty text file named assignment6.txt in your home directory. Edit this
Problem: (a) Modern operating systems are interrupt driven. If there are no processes to execute, no I/O devices to service, and no users to whom to respond, an operating syste
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