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Virtual file systems
The file-system execution having of three major layers. The first layer is the file-system interface, based on the open, read, write and close calls and file descriptors.
Now let's implement bounded producer-consumer with semaphores, a Coke machine which is initially empty: semaphore sem_mutex = 1 // binary semaphore for mutual exclusion, 1==unlo
Define busy waiting and spinlock. When a process is in its significant section, any other process that tries to enter its critical section must loop continuously in the entry c
How can the deadlock be prevented-Safe State Safe state : A state is safe if the system is able to allocate resources to each process in some order and still avoid deadlock.
combined approaches (ULT/KLT)
Define the WindowsNT WindowsNT provides a two-level approach to resource management: process and thread. The process is the uppermost level and contains most of the application
Q. What are the tradeoffs concerned in rereading code pages from the file system versus using swap space to store them? Answer: If codes pages are accumulate in swap space th
Indexed allocation Indexed allocation bringing all the pointers together into one location: the index block. Every file has its own index block, which is an array of disk-block
Explain DosCreateThread Functions Used in the OS/2 DosCreateThread(&threadID,MyThreadFunction,arg,flags,stackSize) DosCreateThread creates a thread within the context of th
Q. Segmentation is alike to paging but uses variable-sized "pages". Describe two segment-replacement algorithms based on FIFO and LRU page replacement schemes. Remember that since
Q. If each the access rights to an object are deleted the object can no longer be accessed. At this stage the object should also be deleted and the space it occupies should be ret
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