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What are two differences among user-level threads and kernel-level threads? Under what circumstances is one type better than the other?
(1) User-level threads are unknown by the kernel, while the kernel is aware of kernel threads.
(2) User threads are listed by the thread library and the kernel schedules kernel threads.
(3) Kernel threads require not be associated with a process while every user thread belongs to a process.
What are the advantages of Contiguous allocation? The advantages are a. Supports direct access b. Supports sequential access c. Number of disk seeks is minimal.
Define buffering. A buffer is a memory area that keeps data whereas they are transferred among two devices or among a device and an application. Buffering is done for three rea
Placement algorithms :calculate where in available real-memory to execute a program. Common functions are next-fit, first-fit, and best-fit. Replacement algorithms :are
Enhanced second-chance algorithm. When we increase the second-chance algorithm by considering both the reference bit and the modify bit as an order pair. We have the following
The CTO is still impressed with your work. He just came back from a technology exposition where he heard about computer clusters. All he knows is that they are the big thing for bu
scattered resposibi;ity and authority -necessity of operation research
Cold Backup: It is copying the three groups of files when the object is shut down. This is a straight file copy, generally from the storage disk directly to tape. You must end th
Acyclic Graph Directories In this kind of directory structure the shared directories or files can exist in the file system in two or more places at once. A tree structure excl
What is internal fragmentation? Consider holes of 20k assume the process requests 18 bites. If we allocate accurately the request block, we are left with a hole of 2k. The over
Briefly discuss on real-time scheduling? It is divided into two types. Hard real-time systems are needed to complete a critical task within a guaranteed amount of time. T
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