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Q. Describe why SSTF scheduling tends to favour middle cylinders over the innermost and outermost cylinders.
Answer: The middle of the disk is the location having the smallest average distance to all other tracks. Therefore the disk head tends to move away from the edges of the disk. Here is one more way to think of it. The present location of the head divides the cylinders into two groups. If the head isn't in the centre of the disk and a new request arrives the new request is more probable to be in the group that includes the centre of the disk therefore the head is more likely to move in that direction.
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
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,
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Write a note on the usage of semaphores. Semaphore is a synchronization tool and it is a variable having integer values. It is accessed only by two standard atomic operations w
LRU approximation page replacement In this we utilize the reference bit associated with the page entry to choose a page to be removed. The various algorithms used for the imp
The primary financial objective of corporation is usually taken to be the maximization of shareholder wealth. Discuss:- i. Ways in which the shareholder of a company can encour
Q. Describe the three main architectural layers of Windows XP? Answer: (1) The HAL (Hardware Abstraction Layer) creates operating system portability by hiding hardware differ
Declare some Applications of Open Source Systems • Finance • Educational • Data Storage and Management • ERP (Enterprise Resource Planning) •File Sharing & FTP
What is an operating system and what are the different types of operating systems? Operating System An Operating System or OS is a software program that allows the compute
Define lazy swapper. Rather than swapping the entire process into main memory, a lazy swapper is used. A lazy swapper never swaps a page into memory unless that page will be ne
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