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Answer Posted / k.k.tripathi
Virtual Memory is space on harddisk where processes which
are not frequently used in RAM are being transfered so as
to increase the speed.If the required process is in virtual
memory it will be swapped to main memory and executed.As
Large is virtual memory so fast the system will be.
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How can the speed of interrupt driven input output systems be improved?
Measurements of a certain system have shown that the
average process runs for a time T before blocking
on I/O. A process switch requires a time S, which is
effectively wasted (overhead). The CPU’s efficiency is
the fraction of its time its spends executing user
programs, i.e., executing user processes. For round robin
scheduling with quantum Q, give a formula for the CPU
efficiency for each of the following:
(a) Q = ∞
(b) Q > S + T
(c) S What is synchronously and asynchronously? WHATE IS DIFFERENT BETWEEN ANLOG , PLC & DCS OR EXPLAIN
ANALOG / PLC / DCS SYSTEME What is BSS(Block Started by Symbol)? What are device drivers? What are the 3 categories of operating systems? How do I enable vlc plugin in chrome? Describe all the processes of the OS. What are read-write locks? what is difference between xp & 2003? Who invented os? What do you mean by semaphore? What resources are used when a thread created? How do they differ from those when a process is created? Briefly explain thrashing.
