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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 memory: semaphore sem=0; // 0==locked for a semaphore
thread Adown(sem) // wait for thread B; note sem has memory!// do stuffthread B// do stuff, then wake up Aup(sem)
You are required to study the important system components, including important data structures, important functions and algorithms, and the various organizational, structural, logi
What is external fragmentation? As process are removed from and loaded to the memory free memory space is bracken into pieces .external fragmentation take place when enough mem
Explain the Architecting For Threads When available, threads are an integral part of any multitasking server application program. It is important that the operating system prov
What is turnaround time? Turnaround time is the interval from the time of submission to the time of completion of a process. It is the sum of the periods exhausted waiting to g
What is the basic approach of page replacement? If no frame is free is available, find one that is not presently being used and free it. A frame can be freed by writing its con
Consider the following snapshot of a system, answer the following questions using the banker's algorithm: 1. What is the content of the matrix Need? Is the system in a safe stat
Define the Scheduling in Multitasking Earlier we learned the concepts and advantages of multitasking. In a system in which one or more tasks( threads or processes) attempt to s
Internal file structure All disk I/O is performed in units of single block, and all blocks are the similar size. It is unlikely that the physical record size will exactly match
Windows admin need it Project Description: We want to protect an executable on operating system level , so the process could be visible among all users while the executable r
Note that the parameter for scanf doesn't need the address operators & because name is an address. However the variable name has no defined space. This can cause problems within C
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