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Describe paging technique used in UNIX systems.
When a process begin in UNIX, not every its memory pages are read in from the disk at once. In its place, the kernel loads into RAM only a few pages at a time. Subsequent to the CPU digests these, the next page is demanded. If it isn't found in RAM, a page fault take place, signaling the kernel to load the next few pages from disk into RAM. This is called as demand paging and is a perfectly normal system activity in UNIX. Just thus you know, it is probable for you, like a programmer, to read in complete processes if there is sufficient memory available to do so. The Unix SVR4 daemon which carry out the paging out operation is called as pageout. It is a long running daemon as well as is created at boot time. The pageout process can't be killed and there are three kernel variables which control the paging operation (Unix SVR4):
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 smalles
What is dispatch latency? The time taken by the dispatcher to stop one process and begin another running is known as dispatch latency.
What is ERD? Entity Relationship Diagram is the graphical representation of the object relationship pair. It is mostly used in database applications.
Processes and threads each have their place in multi-programming, generally to hide latency and to maximize CPU utilization. With the continuing spread of multi-core processors in
we need an information about the different graph directory systems in detail by using shell sort . we also application part of directory systems in practical life. please help us i
unequal size partition
Device Drivers Communicates straight with peripheral devices (disks, tapes, etc.). Responsible for begin physical I/O operations on the device. Pro
FIXED PARTITIONING In a fixed partitioning, the operating system inhabiting some fixed portion of main memory is available for use of multiple processes -Using fixed partit
What is Directory? The device directory or simply called as directory records information-such as name, location, size, and type for all files on that certain partition. The d
Addventage
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