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Here are the conditions necessary for a deadlock to occur; note that all of them are necessary, and none is suf?cient:
1. ?nite resources: the resources are held in a mutually-exclusive way, and they can be exhausted, causing waiting.
2. hold-and-wait: each thread holds one resource while waiting for another.
3. no preemption: threads only release resources voluntarily. No other thread (or the OS) can force the thread to release its resources.
4. circular wait: we have a circular chain of waiting threads.
Problem: a) Define a ‘file' and list the objectives of the file management system. b) List the ways in which programs access files and determine for what file types you woul
SSTF (Shortest Seek Time First) After a demand go to the closest request in the work queue regardless of direction Decrease total seek time compared to FCFS Disadv
Explain the Resource Ownership and Control Operating systems are required to handle many different types of resources. CPU , memory, and I/O devices are some of the varied sys
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
limitations
Process Synchronization in windows 2000
Concept of Reentrancy It is a useful, memory-saving method for multiprogrammed timesharing machines. A Reentrant method is one in which multiple clients can share a singl
Compare contiguous-memory allocation with pure paging in the following aspects: 1. In support of dynamic memory allocation: most systems allow programs to allocate more memory t
basic advantage of using interrupt initiated data transfer over transfer under program control without an interrupt
To explore the UNIX file system, use basic UNIX commands and use a text editor. Task: 1. Logon to Linux. 2. Create a directory "Unix" under your home d
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