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Q. How would utilize of a RAM disk affect your selection of a disk-scheduling algorithm? What factors would you require to consider? Do the similar considerations apply to hard-disk scheduling given that the file system stores recently utilized blocks in a buffer cache in main memory?
Answer: Disk scheduling attempts to decrease the overhead time of disk head positioning. Ever since a RAM disk has uniform access times scheduling is largely unnecessary. The comparison among RAM disk and the main memory disk-cache has no implications for hard-disk scheduling for the reason that we schedule only the buffer cache misses not the requests that find their data in main memory.
Define spooling. A spool is a buffer that holds output for a device, like printer, that cannot accept interleaved data streams. When a request finishes printing, the spooling s
What are the four necessary conditions of deadlock prevention? Ans: Four essential conditions for deadlock prevention: a. The meaning of removing the mutual exclusio
Define FIFO Page Replacement Algorithm This policy simply eliminates pages in the order they arrived in the main memory. By using this policy we simply remove a page based upo
how does it works
LRU approximation page replacement In this we are able to use the reference bit associated with the page entry to choose a page to be removed. The various algorithms used for
Define approaches that require knowledge of the system state? Answer: Deadlock detection, Deadlock prevention, Deadlock Avoidance.
What are threads? A thread - sometimes called as an implementation context or a lightweight process - is a single sequential flow of control within a program. We use threads
Gopher Gallery consists of a shopping mall and a cart ride that covers the 150 acre habitat. There are m visitors and n single-person vehicles. Visitors stroll around the mall at t
A- In a table format, compare between Programmed I/O, Interrupt -driven I/O, and Direct Memory Access (DMA) in terms of basic idea, Advantages, disadvantages, and the operating en
Explain the Peterson's solution for the critical section problem? In Peterson's solution two variables a) flag and b) turn are used as shared variables. If the both shared vari
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