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Basic concepts
When a process is to be changed in, the pager guesses which pages will be used before the process is changed out again. Instead of swapping in a entire process, the pager brings only those essential pages into memory. The valid-invalid bit scheme can be used to distinguish among pages that are in memory and those pages that are on the disk. Access to a page marked unacceptable causes a page-default trap. This trap is the result of the operating system's failure to bring the needed page into memory.
Example 1. The diagram illustrating the data structures of in-memory VFS objects and on-disk objects and their relationships on slide 24 of the lecture notes OSD.4. This diagram i
FIFO page replacement This is the easiest page replacement algorithm. At this juncture the 1 st page entering is the 1 st to leave that is the oldest page leaves. To execute
Write about critical regions and monitors. Critical region definition Monitor definition Implementation of the conditional-region construct Syntax of monitor Monito
Ask questiWhat is dispatcheron #Minimum 100 words accepted#
#include #include #include #include #include int main(void) { int pchan[2], pid, rval, cvar; char buf[20]; if (pipe(pchan) == -1){
What is a two state process model? At any time a process is being implementing by a processor or not. Therefore a process may be in Running or not running state. When an Ope
What is the use of FIFOs in client-server applications
Multithreading - Operating systems that permit different parts of a software program to run concurrently. Operating systems that would come into this category are: Linux UNI
Q. Give the reasons why Windows XP, Solaris and Linux implement multiple locking mechanisms. Explain the circumstances under which they use mutexes, spinlocks, semaphores, adaptiv
Question: a) What special measures must be taken to ensure the reliability, availability, and security of electronic commerce and digital business process? b) What are the c
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