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Q. Explain Message passing among systems?
Communications- Message passing among systems requires messages to be turned into packets of information and sent to the network controller also transmitted across a communications medium and reassembled by the destination system. Packet ordering as well as data correction must take place. Again user programs mightn't coordinate access to the network device or they might receive packets destined for other processes.
What is the information associated with an open file? Various pieces of information are associated with an open file which may be: File pointer Disk location of th
Before proceeding with its execution, every process must obtain all the resources it needs is called Hold and wait
Explain about threading issues? The fork and exec system calls In a multithreaded program of few UNIX systems have chosen to have two versions of fork, one that duplicates e
Define Page stealing Page stealing is taking page frames another working sets
Problem: a) Define the term ‘process' and what are the different constituents of a process. b) In the three-state process model, what does each of the three states signify?
Q. Regard as a logical address space of eight pages of 1024 words every mapped onto a physical memory of 32 frames. a. How several bits are there in the logical address? b. H
What are the disadvantages of swapping technique used in pre-3BSD UNIX systems? If there is excessively much memory contention, processes are swapped out until sufficient
Define Segmentation The memory allocation method subject to “external” fragmentation is Segmentation.
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What is indexed allocation? Every file has its own block of pointers to the sectors of the file.
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