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Contiguous allocation
The contiguous-allocation method needs each file to occupy a set of contiguous blocks of the disk. Disk addresses explain a linear ordering on the disk. Therefore the number of disks seeds needed for accessing contiguously allocated files is minimal. The IBM VM/CMS operating system uses contiguous allocation because it gives such good performance.
What is virtual file system? A Virtual file system switch (VFS) or Virtual file system is an abstraction layer on top of a more concrete file system. The purpose of a VFS
For example, by initializing a semaphore to 0, threads can wait for an event to occur, and impose an ordering constraint, similar to a monitor using condition variables, but with m
What are the disadvantages of linked allocation? The drawbacks are a. Used only for sequential access of files. b. Direct access is not supported c. Memory space neede
Q. Multithreading is a commonly utilized programming technique. Illustrate three different ways that threads could be implemented. Describe how these ways compare to the Linux clon
What is the different between basic synchronization and high level synchronization
What are Tree-structured directories We can generalize the directory structure to a tree of arbitrary height. This permits the user to create their own sub directories and to c
What is graceful degradation? In multiprocessor systems, failure of single processor will not halt the system, but only slow it down by sharing the work of failure system by ot
What are the benefits of multiprogramming? Responsiveness : Multithreading is an interactive application may permit a program to continue running even if part of it is block
scattered resposibi;ity and authority -necessity of operation research
What lead to the concept of paging? The main memory is separated into two parts that are one for the resident operating system, and one for the user processes. We may perhaps p
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