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Additional Reference bits algorithm Here we keep an 8-bit byte for every page in memory. At standard intervals the reference bit is shifted by the OS. If a shift register conta
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
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,
what is the need-to-know principle? why is it important for a protection system to adhere to this principle?
what is file abstraction?
Explain Structure The Grammar for programming language is a formal description of Structure
The objects that a program can access directly are those objects which are referenced by local vari-ables on the processor stack, or by any global/static variables that refer to ob
Q. In following Section we mentioned that disabling interrupts frequently could affect the system's clock. Describe why it could and how such effects could be minimized.
What is a Latency Time Latency Time is the time required through a sector to reach below read/write head.
what is it all about? why do we need? what are the types of backup? how is it done in unix?
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