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What is Belady's anomaly When plotting on a graph the page faults versus the number of available frames. We notice that the number of faults for four frames is greater than th
What are the main differences between operating systems for mainframe computers and personal computers? The design goals of operating systems for those machines are quite diffe
In a multiprogramming and time sharing environment several users share the system simultaneously .what are two such problems?
reason for terminating a process
define semaphore. how can we use semaphore to deal with n-process critical section problem.
What is thrashing? It is a method in virtual memory schemes when the processor spends most of its time swapping pages, rather than implementing instructions. This is because o
Define Page stealing Page stealing is taking page frames another working sets
Q. Describes responsibilities of the I/O manager? Answer: The I/O manager is responsible for file systems and device drivers and network drivers. The I/O manager keeps follow
What is reference string We evaluate an algorithm by running it on a definite string of memory reference and computing the number of page faults. The string of memory reference
What do you understand by “line balancing”? What happens if balance doesn’t exist?
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