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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.
Q. Explain the actions taken by a kernel to context switch between kernel level threads. Answer: Context switching among kernel threads classically requires saving the value
Write a Perl script assignGrades.pl to assign letter grades to the students.
#questionThe Fibonacci sequence is the series of numbers 0,1,1,2,3,5,8,… Formally, it can be expressed as: fib0 = 0 fib1 = 1 fibn = fib n-1 + fib n-2 Write a C program u
What are the necessary conditions for deadlocks? 1. Mutual exclusion : Only one process at a time is able to use the resource. 2. Hold and wait : A process should be holdi
Determine a policy that is not a valid page replacement policy? RU policy (Recurrently used) is not a valid page replacement policy.
Q. Consider the following page-replacement algorithms. Rank the algorithms on a five-point scale from "bad" to "perfect" according to their page-fault rate. Detach those algorithm
advantages and disadvantages of monolithic and layered approach
advantages and disadvantages
How does communication takes place in a distributed system? Distributed systems depend on the networking for their functionality. A network is a communication path among two
Question: a) What do you understand by Active directory domain in Windows Server 2008? Support your answer with a diagram. b) Distinguish between active directory trees
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