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What is an I/O subsystem?
The control of devices connected to the computer is a main issue while designing operating systems. Because I/O deices differ widely in their function and speed, varied methods are required to control them. These processes form the I/O subsystem of the kernel, which divide the rest of the kernel from the managing I/O devices
LRU page replacement In least lately used page replacement algorithm we will replace that page that hasn't been used for the longest period of time. This is similar as an opti
What is an operating system? An operating system is a program that manages the computer hardware. It acts as an intermediate among users of a computer and the computer hardware
Define ‘LRU’ page replacement policy LRU is Least Recently Used page replacement policy.
What are the advantages and disadvantages of multithreading? Advantages : Since by multithreading multiple executions are carried out in the same process environment t
Compare 2 different operating systems.
What is spooling? Spooling overlaps the I/O of single job with the computation of other jobs.
Virtual file systems The file-system execution having of three major layers. The first layer is the file-system interface, based on the open, read, write and close calls and fi
how response times are reduced by allowing time sharing on top of multiprogramming
When programming with threads, there are three very common mistakes that programmers often make: 1. locking twice (depending on the system and type of lock, can cause crashes, h
LOOK o Like SCAN except stops moving inwards (or outwards) when no more requests in that direction exist. C-SCAN (circular scan) o Moves inwards servicing requests u
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