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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.
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
Entry-sequenced file organization The records in an entry-sequenced file are store up in the order they are written into the file. New records are for all time appended to
A set of methods that allow executing a program which is not completely in memory is called A set of methods that allow executing a program which is not completely in memory
What is internal fragmentation? Consider holes of 20k assume the process requests 18 bites. If we allocate accurately the request block, we are left with a hole of 2k. The over
Explain internal fragmentation The Internal fragmentation signifies to the result of reserving a piece of space without ever intending to use it. This space is wasted that this
Cold Backup: It is copying the three groups of files when the object is shut down. This is a straight file copy, generally from the storage disk directly to tape. You must end th
Explain in detail about ipc in linux
Q. Advantages and disadvantages of multiprogramming? Advantages 1. High CPU utilization. 2. It appears that many programs are allotted CPU almost concurrently. D
What is the purpose of the command interpreter? Why is it usually separate from the kernel? It reads commands from the user or from a file of commands and executes them, usuall
single pass assembler
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