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COMPARISON OF DISK SCHEDULING ALGORITHMS
Name Description Remarks (Selection according to requestor)
RSS Random scheduling for analysis and simulation
FIFO First in first out Fairest of them all
PRI Priority by process Control outside of disk queue management
LIFO Last in first out Maximize locality and resource utilization
(Selection according to requested item)
SSTF Shortest seek time first High utilization, small queues
SCAN Back and forth over disk Better service distribution
C-SCAN One way with fast return Lower service variability
N-step-SCAN Multiple queues Scan N records at a time
Service guarantee
FSCAN SCAN using 2 queues load sensitive
how fat file system is organised
Which are the different states of a process? Different status of a process is: New: When the process is created. Running: When instructions are executed. Wait
Virtual addresses are made up of two parts: the ?rst part is the page number, and the second part is an offset inside that page. Suppose our pages are 4kb (4096 = 212 bytes) long,
What is a resource-allocation graph? Deadlocks can be explained more precisely in terms of a directed graph called a system resource allocation graph. This graph having of a se
Write a note on semaphores A semaphore is a tool meant for synchronizing multiple processes trying to access a shared variable. That is a semaphore is used to deal with the cri
Define UFD and MFD. In the two-level directory structure, every user has her own user file directory (UFD). Every UFD has a similar structure, but lists only the files of a one
what is dual mode operation
Explain about disk scheduling with neat diagram? FCFS Scheduling SCAN scheduling C-SCAN scheduling SSTF scheduling LOOK Scheduling
The field that consists of a segment index or an internal index is known as Target datum is field that consists of a segment index or an internal index.
BEST FIT ALGORITHM Here scanning is for the finest fit one. Signifies it searches the entire list for the best fit position. For the process therefore in that the process will
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