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what is dual mode operation
Q. What system calls have to be implementing by a command interpreter or shell in order to start a new process? Answer: In the UNIX systems a fork system call followed by an ex
While it is hard to resolve a deadlock which has been detected, fortunately it is fairly easy to prevent deadlocks from ever happening. The key is that the conditions above for dea
What is spooling? Spooling overlaps the I/O of single job with the computation of other jobs.
Define LRU Page Replacement Algorithm LRU policy: LRU expands to least currently use. This policy suggests which we re- move a page whose last usage is farthest from current ti
operating systems and its types together with its design issues and their examples.
Q. State three merits of placing functionality in a device controller rather than in the kernel and State three disadvantages. Answer: Three advantages: Bugs are less probabl
What is a Relocatable program? The Relocatable programs can be loaded almost anywhere in memory.
Write a brief note on demand paging. A demand paging is alike to a paging system with swapping. The Processes reside on the secondary memory while we want to implement a proces
What is Single-level Directory All files are constrained in the similar directory, which is simple to support and understood. One limitation is when the number of files enhance
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